Start with a simple ice cream base or crème Anglaise, and mix in the ripest summer fruits, high-quality chocolate (whether melted and/or cut into chunks), or toasted nuts to create your own flavors.
About the Process
The other ingredients of ice cream--added through the freezing process, not the recipe--are ice crystals and air. Although ice cream can be made without an ice cream machine or old-fashioned hand-cranked churn, it will not have the desired smooth, creamy texture. Just freezing cream and sugar results in relatively large ice crystals that are detectable to the tongue. By agitating the mixture and adding air to increase its volume, ice cream machines make the texture of the finished product light and smooth.
Ultra-premium ice creams have a low "overrun," that is, the volume of air added to the mix. That's why the cartons feel so heavy, because the ice cream is very dense. Some lower-grade ice creams that consist of half air, half ice cream mix have a 100% overrun. Those cartons are correspondingly light.
Custard Ice Creams
Ice cream is divided into two basic categories: custard-style (or French custard-style) and Philadelphia-style (also called "New York" or "American"). Custard ice cream is, as the name suggests, made from a custard base. Egg yolks or whole eggs are whisked together with hot milk or cream and sugar, and cooked gently until the mixture becomes thick enough to coat the back of a spoon. Egg yolks are natural emulsifiers, and the resulting custard makes an ice cream that is remarkably smooth and rich. Chill the custard for at least one hour before freezing.
Egg-Free Ice Creams
Philadelphia-style ice cream contains no egg yolks and does not require cooking. It's based purely on cream and sugar, and is very delicate-tasting, with so few ingredients.
Ripening and Storing
When the mixture has thickened and is hard to stir, remove it from the ice cream maker and transfer it to a freezer container. While it's tempting to eat it right away, when it's a "soft-serve" consistency, ice cream should be allowed to harden in the coldest part of your freezer for several hours or overnight.
If you have leftover ice cream, however unlikely that may be, store it airtight with a layer of plastic wrap pressed onto the surface to prevent it from absorbing odors.