Custard vs. Ice Cream vs. Gelato: What's Actually the Difference
Quick answer: Custard, ice cream, and gelato are all frozen dairy desserts, but they are defined by three things: egg yolk content, milkfat content, and how much air gets churned in. Custard contains at least 1.4 percent egg yolk and at least 10 percent milkfat, giving it a rich, dense texture. Ice cream contains at least 10 percent milkfat but does not require egg yolk, and it has the most air churned into it, making it light and fluffy. Gelato has less milkfat than ice cream (typically 4 to 9 percent), very little air, and usually no egg yolk, which is why it tastes denser and more intensely flavored despite being lower in fat.
Comparison Table
| Custard | Ice Cream | Gelato | |
|---|---|---|---|
| Legal standard (US) | FDA 21 CFR 135.110 (frozen custard, differentiated by egg yolk content) | FDA 21 CFR 135.110 | No US federal standard of identity |
| Minimum egg yolk | 1.4% | Not required | Not typically used |
| Minimum milkfat | 10% | 10% | No federal minimum; typically 4-9% |
| Air (overrun) | Low | High | Very low |
| Texture | Dense, rich, custard-like | Light, airy | Dense, smooth, elastic |
| Serving temperature | Slightly warmer than ice cream | Standard freezer temp | Served slightly warmer than ice cream |
| Origin | United States (Coney Island, 1919) | Traced to Tang Dynasty China; modernized in the US | Italy |
What Makes Custard Different
Custard, specifically frozen custard, is defined under the same FDA standard of identity as ice cream, 21 CFR 135.110, which requires a minimum of 1.4 percent egg yolk solids and at least 10 percent milkfat to be labeled frozen custard rather than ice cream. That egg yolk content is what separates it from ice cream. It also goes through a different production process. Frozen custard machines incorporate very little air into the mixture, which is why frozen custard has that dense, almost pudding-like richness compared to a standard scoop of ice cream. The egg yolks act as a natural thickener and emulsifier, giving custard its smooth, velvety mouthfeel without needing extra stabilizers.
What Makes Ice Cream Different
Ice cream is regulated under a separate FDA standard that also requires a minimum of 10 percent milkfat, but it does not require any egg yolk. Some ice cream recipes do include egg yolks for texture, but in amounts below the 1.4 percent threshold that would classify it as custard. The bigger distinguishing factor is air. Ice cream is churned quickly and aggressively, which folds a large volume of air into the base. This is called overrun, and it is why ice cream has a lighter, fluffier texture than both custard and gelato, even though all three start from a similar dairy and sugar base.
What Makes Gelato Different
Gelato does not have a federal standard of identity in the United States, which is part of why the term gets used loosely on menus and packaging. Traditionally, Italian gelato is made with more milk and less cream than American ice cream, resulting in a lower fat content, typically in the 4 to 9 percent range compared to ice cream's 10 percent minimum. Gelato is also churned much more slowly than ice cream, which means very little air gets incorporated. Less air means more density per scoop, and less fat means the flavor comes through more directly, which is why gelato is often described as tasting more intense than ice cream even though it is lower in fat.
Frequently Asked Questions
What makes custard different from ice cream?
Custard must contain at least 1.4 percent egg yolk and is churned with very little air, giving it a dense, rich texture. Ice cream does not require egg yolk and is churned with much more air, giving it a lighter texture.
Is frozen custard the same as regular custard?
No. Regular custard is typically a stovetop or baked dessert, like a pastry cream or baked custard, served unfrozen. Frozen custard uses the same egg yolk and milkfat requirements but is churned and frozen like ice cream.
What's the difference between gelato and ice cream?
Gelato has less milkfat than ice cream, usually 4 to 9 percent compared to ice cream's 10 percent minimum, and it is churned more slowly, so it holds much less air. This makes gelato denser and more intensely flavored per bite.
Why does gelato taste different from ice cream?
Because gelato has less fat coating the tongue and less air diluting each bite, the flavor comes through more directly. Ice cream's higher fat content and airier texture spread the flavor out more, making it taste milder by comparison.
Does custard have more calories than ice cream?
Not necessarily. Calorie content depends on the specific recipe, sugar content, and fat percentage of each product, not simply on whether it is classified as custard or ice cream.
Does gelato have less fat than ice cream?
Yes, in most cases. Traditional gelato typically contains 4 to 9 percent milkfat, while US ice cream must contain at least 10 percent milkfat by federal standard.