Inside the R&D Shift Vol. 4
Updated: Sep 4
🍋🟩 Key Lime Cheesecake, Rapid Infusions & Rebuilding a Cobra’s Fang
Every week at the speakeasy, we develop an entirely new lineup of cocktails for the weekend menu.
From the outside, an R&D shift probably sounds pretty relaxed. Make a couple drinks, taste them, make a few adjustments, take a picture, and move on.
That is definitely not how it goes.
R&D is usually controlled chaos.
I’m working on multiple cocktails at the same time, making syrups and cordials, infusing spirits, adjusting acids, testing garnishes, washing equipment, tasting, changing ratios, tasting again, and constantly thinking about how everything is eventually going to scale to roughly 80 cocktails for service.
That last part is important.
Making one great cocktail is one thing.
Creating a drink that is balanced, visually interesting, has a story behind it, can actually be prepped efficiently, and can still be executed consistently during a slammed
Saturday night is a completely different challenge.
This week, two of my cocktails went in completely different directions.
My vodka cocktail, King Louie, started with one of my favorite desserts: key lime cheesecake.
My rum cocktail, The Don, started with Donn Beach’s classic Cobra’s Fang, took several detours during testing, and eventually found its way back toward the bones of the original.
Neither cocktail finished exactly where it started.
🔥 That’s the part of R&D I love.
🍋🟩 KING LOUIE
🍰 Turning Key Lime Cheesecake Into a Cocktail
The inspiration for King Louie came pretty quickly.
I love key lime cheesecake.
I wanted the drink to capture all of those flavors I associate with it:
Bright key lime. Toasted graham cracker. Vanilla. Coconut. Creamy richness. A little white chocolate.
The problem?
Almost every ingredient you immediately associate with cheesecake also pushes toward sweetness.
Vanilla. White chocolate. Coconut. Cream liqueur. Graham cracker.
Put all of that together without enough acidity or structure and you don’t have a cocktail anymore.
You have dessert in a glass.
So instead of trying to recreate the entire cheesecake at once, I started pulling the dessert apart.
🧠 What represents the crust?
🧠 Where does the vanilla filling come from?
🧠 How do I make the key lime bright enough to cut through everything?
🧠 How much coconut is enough before it becomes a coconut cocktail instead of a key lime cheesecake cocktail?
That gave me a much better place to start.
⚡ The Crust: Rapid Graham Cracker-Infused Vodka
The first thing I wanted to solve was the graham cracker.
I could have made a graham cracker syrup, but that would have added even more sugar to a cocktail that already had several sweet components.
Instead, I wanted the graham cracker flavor directly in the vodka.
A traditional infusion could have meant waiting hours or even overnight.
I didn’t have that kind of time during R&D.
So I pulled out my iSi whipper and used a rapid infusion.
I added the vodka and graham cracker to the whipper, sealed it, and charged it once with N₂O.
Then I shook it hard.
After shaking, I let everything sit under pressure for approximately two minutes.
Then I released the pressure quickly and under control rather than slowly bleeding it out.
That rapid pressure change is part of what makes this style of infusion so useful. Pressure helps the spirit penetrate the porous graham cracker, and the rapid decompression helps extract those aromatic compounds back into the liquid.
🧪 My Rapid Infusion Workflow
Add vodka and graham cracker to the iSi.
Seal.
Charge once with N₂O.
Shake aggressively.
Let sit under pressure for about two minutes.
Release the pressure quickly and safely.
Open.
Strain.
Within minutes, the vodka had picked up that toasted graham cracker character I wanted.
🔥 That became the crust of King Louie.
And on an R&D shift where I’m trying to finish several cocktails at once, turning an infusion that could take hours into something I can accomplish in minutes is huge.
🥥 Building the Coconut Key Lime Cordial
Next came the ingredient that really became the backbone of King Louie:
🍋🟩 Coconut Key Lime Cordial
I wanted the cordial to accomplish several things at once.
Rather than having coconut water, lime, sugar, acids, citrus oils, and salt all becoming separate pieces of the final build, I wanted to balance those flavors together first.
It also had to make sense when scaled for approximately 80 cocktails.
Juicing an army of tiny key limes during an already packed R&D shift wasn’t happening.
So for the larger prep, I was working with roughly:
3 cups lime juice
5.5 cups coconut water
Then I brought actual key lime character into the cordial with freshly grated key lime zest.
That was important.
The juice gives me acidity, but so much of what we immediately recognize as fresh lime comes from the aromatic oils in the peel.
So I grated fresh key lime peel directly into the mixture to extract those oils and reinforce that unmistakable key lime aroma.
🧪 The Cordial Included
Lime juice
Coconut water
Fresh key lime zest
Sugar
Citric acid
Malic acid
Saline
I blended everything together and then strained it.
Now I had one ingredient carrying coconut, fresh lime aroma, sweetness, structured acidity, and a little salinity.
🧠 Why Citric and Malic Acid?
I wasn’t adding acids just to make the cordial more sour.
I wanted the acidity to have more structure.
Citric acid gives that immediate, familiar citrus snap.
Malic acid brings a slightly different tartness and helps the acidity carry through the finish.
Using them together allowed me to intensify the lime character without simply pouring more lime juice into the drink.
I also incorporated saline into the cordial.
Not enough to make anything taste salty.
Just enough to sharpen the citrus and make the surrounding flavors pop.
And later, I would still add another dash of saline directly to the finished King Louie.
🍰 Building the Cheesecake Filling
Once the graham-infused vodka and coconut key lime cordial were working, I started layering in the cheesecake side.
🍦 0.5 oz Giffard Vanilla Liqueur
That gave me the clear vanilla note I wanted from the filling and helped connect the graham cracker to the bright key lime.
🥥 0.25 oz Malibu
The coconut water inside the cordial was already doing some of the work, so I didn’t need much.
The Malibu was there to reinforce the coconut and give it a slightly richer profile without allowing coconut to take over the entire cocktail.
Then came two smaller additions:
🍫 1 bar spoon White Chocolate
and
🥛 1 bar spoon Disaronno Velvet Liqueur
I liked both of these at a bar spoon because they added richness without becoming dominant flavors.
The white chocolate gives King Louie another subtle dessert note.
The Disaronno Velvet adds creamy, almond-like richness that works naturally alongside vanilla, graham cracker, and cheesecake flavors.
Then I added:
🍯 0.25 oz Rich 2:1 Simple Syrup
Enough to round everything out without pushing the cocktail too far sweet.
And because I still wanted some fresh citrus snap outside of the cordial:
🍋🟩 0.25 oz Fresh Lime Juice
Finally:
🧂 1 Dash Saline
That final dash goes directly into the cocktail in addition to the saline already built into the cordial.
It helps pull the entire thing together.
🥛 Then I Tried Clarifying King Louie
My original vision was actually to make King Louie a clarified cocktail.
And I didn’t just think about it.
I made the test batch.
For the clarification, I used whole milk and cream cheese.
Conceptually, it made sense.
The cocktail was inspired by cheesecake,
so using cream cheese as part of the clarification tied directly back into the story rather than feeling like a technique I was forcing into the drink just because I could.
And visually?
I really liked it.
The clarified King Louie was cleaner.
The presentation was sharper.
More polished.
From a visual standpoint, it was probably the better-looking version.
Then I tasted it next to the original.
⚖️ The Clarified Version Looked Better. The Original Tasted Better.
The clarified King Louie was still delicious.
It absolutely worked.
I even went back and acid-adjusted the clarified version to restore some of the brightness that had softened during clarification.
That helped.
But when I tasted both versions side by side, there was no getting around it.
I liked the original more.
The unclarified King Louie had more
punch.
More graham cracker.
More vanilla.
More key lime.
More coconut.
Basically, all of the flavors I had spent the entire R&D process building were louder and more expressive in the original.
Clarification cleaned the cocktail up visually, but it also softened some of those flavors.
And that gave me a decision to make.
Do I serve the version that looks cleaner?
Or...
Do I serve the version that tastes more like the dessert that inspired it?
I chose the latter.
🔥 King Louie stayed unclarified.
🧠 More Technique Doesn’t Automatically Mean a Better Drink
That was probably my biggest lesson from developing King Louie.
Clarification is cool.
Rapid infusions are cool.
Foams are cool.
Fat washing is cool.
Acid adjusting is cool.
But the technique still has to earn its place in the drink.
The iSi infusion earned its place because it gave me a strong graham cracker flavor and saved me hours of prep time.
The clarification improved the appearance, but I preferred the flavor without it.
So I removed it.
🔥 Flavor wins.
🗿 THE DON
🌴 Taking Donn Beach’s Cobra’s Fang Apart
After King Louie, I went almost completely in the opposite direction.
For the rum cocktail, I wanted to start with one of tiki’s classics:
🐍 The Cobra’s Fang
The Cobra’s Fang comes from Donn Beach, one of the foundational figures of early tiki culture.
That gave the drink another connection I liked.
Donn Beach and early tiki culture are closely tied to Southern California, and I’m always looking for subtle ways to bring a little of my California roots into what I create.
That connection eventually gave me the name:
🌴 The Don
A simple nod to Donn Beach and the cocktail that started the entire idea.
But I definitely didn’t start by following the original recipe closely.
🥃 Smith & Cross + Cachaça
For my base, I landed on:
1 oz Smith & Cross Jamaican Rum
with
0.5 oz Cachaça
That immediately gave The Don a lot of personality.
Smith & Cross brings that unmistakable Jamaican funk: ripe tropical fruit, fermentation character, esters, and serious intensity.
Cachaça adds something completely different with its grassy, fresh sugarcane character.
Together, they gave me a strong enough base to start pulling apart the rest of the Cobra’s Fang.
🍉 Passion Fruit Became Watermelon
One of the signature fruit components of a traditional Cobra’s Fang is passion fruit.
I went somewhere completely different.
🍉 REAL Watermelon Purée
Passion fruit is loud.
Tart.
Highly aromatic.
Aggressively tropical.
Watermelon is softer and more delicate.
That changed the personality of the drink immediately.
It also made balancing the cocktail trickier because watermelon can disappear quickly once you surround it with funky Jamaican rum, citrus, spice, and absinthe.
But I liked the direction enough to keep it.
Eventually, the final build landed at:
🍉 0.75 oz REAL Watermelon Purée
Enough for the watermelon to actually survive everything happening around it.
🧪 My Early Version Went Even Further Away
During the first rounds of testing, I kept pulling apart the original Cobra’s Fang.
I tried guava purée in place of the orange component.
Then I experimented with Amaro di Angostura instead of falernum.
The logic behind the amaro made sense.
It gave me baking spice, bitterness, herbs, and warm aromatics.
The cocktail itself wasn’t bad.
But at a certain point, I had to look at what I had actually done.
Passion fruit was gone.
Orange had become guava.
Falernum had become amaro.
I was getting farther and farther away from the drink that supposedly inspired The Don.
And that made me rethink the entire direction.
🔄 Bringing The Don Back Toward Its Roots
Instead of continuing to change everything, I started bringing some of that classic Cobra’s
Fang architecture back.
Falernum returned.
My first test was:
0.5 oz Falernum
Too much.
With the watermelon and everything else going on, half an ounce pushed the cocktail too sweet and started muddying the flavors.
So I cut it in half.
0.25 oz Falernum
Much better.
Now I still got the lime, ginger, clove, and tropical spice character I wanted without letting falernum dominate the cocktail.
That’s one of those tiny R&D changes that makes a huge difference.
🧠 Sometimes the ingredient isn’t wrong.
The amount is wrong.
🍊 Guava Came Out. Grapefruit Came In.
I eventually moved away from the guava too.
Instead, I brought the drink back toward citrus with:
🍊 0.5 oz Fresh Grapefruit Juice
I liked grapefruit much more against the watermelon.
Watermelon is soft and round.
Grapefruit brings acidity, slight bitterness, and a drier edge.
Then I wanted to reinforce something very specific about the grapefruit:
The peel.
So I added:
🍊 1 bar spoon Giffard Pamplemousse
That small addition helped bring in more of the aromatic, slightly bitter grapefruit-peel character.
The grapefruit juice gives me the fruit.
The Pamplemousse gives me more of the impression of those fragrant oils from the peel.
At only a bar spoon, it reinforces the grapefruit without becoming the cocktail.
🌿 Adding Warm Spice Back In
Then came:
🌰 0.25 oz Cinnamon Simple Syrup
I wanted some baking spice back in the drink, but I didn’t want somebody taking a sip and immediately thinking:
Cinnamon cocktail.
It needed to live underneath everything else.
The cinnamon helps bridge the rum, watermelon, grapefruit, and falernum while bringing a little warmth back into the structure.
Then:
🍋🟩 0.5 oz Fresh Lime Juice
The grapefruit brings acidity, but the lime gives the cocktail that brighter, sharper citrus snap I wanted.
And:
🧂 1 Dash Saline
Just enough to tighten the whole thing up.
🌿 Six Drops of Absinthe Stayed
There was one part of the Cobra’s Fang I knew I wanted to keep.
6 Drops Absinthe
Six drops sounds insignificant.
It isn’t.
That tiny amount puts an anise and herbal thread underneath the entire cocktail.
You shouldn’t drink The Don and immediately think:
Absinthe.
That would mean I used too much.
It should sit somewhere in the background, making everything feel a little more interesting.
Take those six drops away, and something is missing.
So even as almost everything else changed during R&D...
🔥 Those six drops stayed.
❌ Angostura Bitters Came Out Completely
The classic Cobra’s Fang also uses Angostura bitters.
I tested them.
Eventually, I removed them completely.
Once I had the Smith & Cross, cachaça, watermelon, grapefruit, Pamplemousse, falernum, cinnamon, lime, absinthe, and saline working together, the additional bitters weren’t making the finished cocktail better.
So they went.
That’s part of R&D too.
An ingredient doesn’t deserve to stay simply because the classic recipe used it.
The absinthe earned its place.
The Angostura bitters didn’t.
🔄 The Don Basically Traveled in a Circle
That was probably my favorite part of developing this cocktail.
I started with a Cobra’s Fang.
Then I took it apart.
Passion fruit became watermelon.
Orange became guava.
Falernum became Amaro di Angostura.
Then I tasted everything and realized:
I had moved too far away from what made me want to riff on the Cobra’s Fang in the first place.
So I started rebuilding.
Watermelon stayed.
Guava came out.
Grapefruit came in.
Falernum came back, but dropped to 0.25 oz after the 0.5 oz test proved too sweet.
A bar spoon of Giffard Pamplemousse reinforced the grapefruit peel.
0.25 oz cinnamon simple brought back warm spice.
Fresh lime sharpened it.
The Angostura bitters disappeared.
The six drops of absinthe stayed.
Now I could taste where The Don came from again.
It wasn’t a Cobra’s Fang.
It wasn’t supposed to be.
But it was clearly a riff.
🔥 Respect the bones. Then make it yours.
📋 Final Specs
After all the testing, adjusting, clarifying, abandoning clarification, swapping ingredients, and bringing others back, these were the final builds.
🍋🟩 KING LOUIE
🍰 Key Lime Cheesecake-Inspired Vodka Cocktail
1.75 oz Graham Cracker-Infused Vodka
0.5 oz Giffard Vanilla Liqueur
0.25 oz Malibu
1 bar spoon White Chocolate
1 bar spoon Disaronno Velvet Liqueur
0.25 oz Rich 2:1 Simple Syrup
0.25 oz Fresh Lime Juice
0.75 oz Coconut Key Lime Cordial
1 dash Saline
🧊 Method
Shake hard with ice and double strain into the serving glass.
🍋🟩 Garnish
A triangle-cut graham cracker finished with white chocolate and fresh key lime zest.
The garnish brings the whole concept back around visually.
Before you even taste the cocktail, you’re seeing the graham cracker crust, white chocolate richness, and fresh lime that inspired the drink.
🌴 THE DON
🐍 Cobra’s Fang-Inspired Rum Cocktail
1 oz Smith & Cross Jamaican Rum
0.5 oz Cachaça
0.25 oz Falernum
1 bar spoon Giffard Pamplemousse
0.75 oz REAL Watermelon Purée
0.5 oz Fresh Grapefruit Juice
0.5 oz Fresh Lime Juice
0.25 oz Cinnamon Simple Syrup
6 drops Absinthe
1 dash Saline
🧊 Method
Shake hard and dirty dump.
Top with pebble ice.
🌺 Garnish
Finish with an orchid and a torched cinnamon stick.
The cinnamon stick brings the warm spice into the aroma before the drink ever hits your palate, while the orchid keeps that classic tropical presentation.
👀 What Guests Don’t See
Eventually, somebody sits at the bar and orders King Louie or The Don.
They see the finished drink.
The garnish.
The glass.
Maybe they take a picture.
What they don’t see is everything that happened before it got there.
They don’t see the graham crackers and vodka loaded into an iSi.
Charge.Shake.Two minutes under pressure.Rapid release.Strain.
Make the cordial.
Measure coconut water.Grate key lime zest.Add citric acid.Malic acid.Sugar.Saline.Blend.Strain.
Build King Louie.
Taste.
Make a completely separate clarified test batch using milk and cream cheese.
Wait.
Strain.
Taste.
Acid-adjust it.
Taste it against the original.
Then admit:
🔥 The prettier cocktail isn’t the better cocktail.
Go back to the original.
Then move onto The Don.
Watermelon instead of passion fruit.
Guava instead of orange.
Amaro di Angostura instead of falernum.
Taste.
Interesting, but too far away.
Bring falernum back.
0.5 oz?
Too sweet.
Drop it to 0.25 oz.
Lose the guava.
Bring in grapefruit.
Add Pamplemousse.
Cinnamon.
Fresh lime.
Six drops absinthe.
Angostura bitters?
Take them out.
Taste again.
Better.
And once the recipes are finally finished?
📦 Figure out how to prep enough for roughly 80 cocktails.
That’s the R&D shift.
🧠 The Biggest Lesson From This Week
King Louie and The Don ended up teaching me essentially the same lesson from two completely different directions.
With King Louie, I added a technique because I thought it would elevate the cocktail.
Then I realized the original version had more flavor and personality.
With The Don, I changed so many pieces of a classic that I eventually had to bring some of its original structure back.
Both came down to the same thing:
🔥 Taste the drink instead of falling in love with the idea.
Sometimes the coolest technique isn’t the right technique.
Sometimes your first version isn’t your best version.
Sometimes adding an ingredient fixes a cocktail.
Sometimes removing one does.
Sometimes the cleaner, prettier drink isn’t the better drink.
And sometimes you have to take a classic completely apart before you understand which parts actually made it work in the first place.
📬 Want More From Inside the R&D Shift?
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Until the Next R&D Shift
That’s what R&D really looks like behind the bar: an idea, a first pour, a few adjustments, and eventually a cocktail that earns its place on the menu.
I’ll be back with another Inside the R&D Shift soon, breaking down the inspiration, testing, mistakes, and final specs behind the next round of cocktails.
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