What Is Liquor-Infused Frozen Custard? (And How It Differs From Ice Cream)

You have had ice cream. You think you know frozen desserts. And then you try frozen custard for the first time and quietly realize that everything before it was just a warm-up.

At  Crème de Liqueur people ask us all the time: what exactly is frozen custard, and why is it so much richer than the ice cream I’ve been eating my whole life? The answer comes down to a few key ingredients, a slower process, and one very intentional addition that makes our version unlike anything else in the freezer. Let’s get into it.

First, what even is frozen custard?

Think of frozen custard as the most rich form of ice cream in existence. That is not marketing language. It is chemistry. Frozen custard starts with the same foundation as ice cream — milk, cream, and sugar — but adds one critical ingredient that changes everything: egg yolks.

By FDA standards, a frozen dessert must contain at least 1.4% egg yolk solids by weight to legally be called frozen custard. Those egg yolks act as an emulsifier, binding the fat and water molecules together in a way that creates a texture that is noticeably denser, silkier, and more velvety than what you find in a standard scoop. The result is a mouthfeel you simply cannot replicate without them.

“Think of it like the most rich form of ice cream in existence. There are extra egg yolks in the recipe to give it this rich, creamy, dreamy mouthfeel. You will not be able to stop with the spoonfuls. Trust me.”

— Elizabeth, Co-Founder, Crème de Liqueur

The numbers that explain everything

Here is where it gets interesting for anyone who wants to understand what is actually going on between one frozen dessert and another. The differences are measurable, and they matter.

That air number is the one that stops people. Standard ice cream can legally contain up to 100% overrun, meaning that by volume, up to half of what you are scooping is air that was whipped in during churning. Some commercial brands push that ceiling hard. It is why a half-gallon tub can feel surprisingly light, and why the first bite sometimes collapses faster than expected.

Frozen custard is churned slowly in specialized machines that keep air incorporation to a minimum. The result is an overrun of roughly 10 to 15 percent. What that means in practice is that almost every bit of volume in the pint is actual frozen custard. Dense, rich, and intensely flavored from the very first spoonful to the very last.

How liquor changes the chemistry (and why that matters)

Adding spirits to a frozen custard base is not simply a matter of pouring bourbon into cream and hoping for the best. Alcohol fundamentally changes the chemistry of frozen desserts, and understanding why helps explain why getting it right requires such care.

Freezing point depression. Alcohol lowers the freezing point of any mixture it is added to. This is the same principle behind antifreeze. In frozen custard, this means the base does not freeze as hard or as rigidly as a spirit-free version. The result is a softer, more scoopable texture straight from the freezer, one that yields to the spoon immediately rather than requiring a few minutes to soften.

Fewer large ice crystals. When alcohol binds to water molecules, it disrupts the formation of large ice crystals during the freezing process. Smaller crystals mean a smoother, creamier texture throughout. This is one reason why a well-made liquor-infused frozen custard can feel even silkier than its spirit-free counterpart.

Flavor compounds carried by fat and alcohol together. Different spirits behave differently once inside a frozen base. Aged spirits like bourbon and rum carry aromatic compounds that remain expressive even at cold temperatures. Bourbon and vanilla play to add a deeper flavor while vodka, by contrast, acts as a cleaner carrier, allowing the flavors around it — the espresso, the coffee liqueur — to take the lead.

The balance question. Too much alcohol and the base will not set properly, resulting in a slushy texture that never quite firms up. Too little and the flavor contribution of the spirit gets lost. At 2% ABV, Crème de Liqueur sits in exactly the right place: enough spirit to influence the texture, elevate the flavor, and deliver that hint of mischief, without tipping the balance into something that does not behave like frozen custard anymore.

Now add the spirits. This is where it gets really good.

Frozen custard on its own is already something special. What Crème de Liqueur does is take that already-rich base and blend in real, top-shelf spirits — coffee vodka, bourbon, amaretto, rum — at 2% ABV per pint. That is alcohol by volume, for the curious.

The addition is not just about the alcohol. It is about what the spirits bring to the flavor profile. Each one was chosen because it belongs in the recipe. The spirits give the custard a beautiful balance of flavor, a feeling of luxury, and just a hint of mischief.

The spirits in our lineup

• Coffee vodka — in the Espresso Martini frozen custard, where it meets chocolate and cream for the smoothest, most approachable pint in the collection.
• Bourbon — in the Chocolate Brownie Bourbon, where the bourbon’s oak-aged vanillin deepens the custard’s natural richness and amplifies every warm, caramel note in the base.
• Rum — woven through the Vanilla Bean Horchata for a cinnamon-spiced, warmly spirited scoop.
• Amaretto — in Pistachio Amaretto, where nutty and sweet meet in a pint that is subtle and deeply satisfying.

Why frozen custard, and why now?

Frozen custard was invented in 1919 on Coney Island, which means it has been the best-kept secret in frozen desserts for over a century. It has always been the treat that people discover once and then spend years looking for again. The texture. The density. The way it melts slower and lingers longer than anything else in the bowl.

Crème de Liqueur exists because frozen custard deserved to grow up. A dessert this rich, this carefully made, paired with spirits chosen for their flavor rather than their proof. The result is something that belongs at the end of a dinner party, a birthday celebration, or a very good Tuesday when you decide you have earned it.

Ready to experience it for yourself? Order Crème de Liqueur frozen custard directly through Goldbelly at goldbelly.com/restaurants/creme-de-liqueur, with all orders shipped on Mondays and Thursdays in dry ice so every pint arrives perfectly frozen. Cheers to treating yourself well.

FAQ: Frozen Custard vs. Ice Cream

Is frozen custard healthier than ice cream?

Not necessarily, and that is not really the point. Frozen custard and ice cream share the same minimum butterfat requirement of 10%. What frozen custard has more of is egg yolks, and less of is air. Because of that lower overrun, you are getting more actual product per spoonful, which means a smaller serving tends to feel more satisfying.

Can you taste the alcohol in Crème de Liqueur?

You can taste the flavor of the spirit, which is very much the intention. At 2% ABV, the alcohol itself is subtle, but what it brings to the recipe — the warmth of the bourbon, the depth of the coffee vodka, the nuttiness of the amaretto — comes through beautifully in every scoop.

Why does frozen custard feel creamier than ice cream?

Two reasons: egg yolks and air. The egg yolks act as emulsifiers and create a denser, silkier texture, while the slow-churn process keeps air incorporation at just 10 to 15% overrun compared to up to 100% in standard ice cream. Less air means more custard in every bite, and that density is exactly what gives it that rich, velvety mouthfeel.

What is overrun, exactly?

Overrun refers to the percentage of air churned into a frozen dessert during production. A 100% overrun means the finished product is 50% air by volume. Frozen custard sits at around 10 to 15% overrun, meaning nearly all of what is in the pint is actual custard. It is one of the main reasons frozen custard is so noticeably heavier and richer than most ice creams.

Does the alcohol affect the texture of the custard?

It does, and intentionally so. Alcohol lowers the freezing point of the custard base, which keeps the texture softer and more scoopable straight from the freezer. It also disrupts the formation of large ice crystals during freezing, contributing to an even smoother result. At 2% ABV, the effect is subtle but meaningful: a little softer, a little silkier, and a lot more enjoyable.

Where can I order Crème de Liqueur?

Crème de Liqueur ships nationwide via Goldbelly. Visit goldbelly.com/restaurants/creme-de-liqueur to build your box. All orders ship on Mondays and Thursdays with dry ice to ensure every pint arrives in perfect condition.