ABOUT THIS RECIPECool Pistachio, Bright Cherry Sauce
Parfait is a frozen dessert served in slices. For this version, a light, whipped mixture of egg yolks and sugar forms the base; whipped cream makes it soft, and pistachio paste gives it a rich, unmistakable nutty flavor. Finely chopped pistachios add little crunchy bits. Unlike ice cream, you don’t need to stir the mixture as it freezes: the air whipped into the egg yolks and cream helps keep the parfait smooth.
Pistachio paste accounts for much of the flavor, so choose one in which pistachios are the main ingredient, without much added sugar or oil. You can often find it at delicatessens and larger supermarkets. Smooth paste blends easily into the egg yolks; if it’s firm, first loosen it with a spoonful of the whipped mixture. Use unsalted, shelled pistachios for the chopped nuts. A small pinch of salt brings out the nutty flavor without making the dessert taste salty.
Fresh sour cherries are mostly available in summer, but frozen cherries work well in the sauce all year round. Cook them briefly with sugar and lemon juice: this makes them glossy and soft while leaving some of the cherries whole. Let the sauce cool completely before serving it with the parfait. If the sauce is very thin after cooking, let it simmer gently for a few more minutes; it will also thicken a little as it cools. Sweet-and-sour cherries from a jar also work, but drain them and start with less sugar.
A metal loaf pan measuring about 20 by 10 centimeters gives you neat slices; line it with baking paper so you can lift the parfait out easily later. Let the dessert set for at least six hours, preferably overnight. Take only the amount you need out of the freezer and let it sit at room temperature for about ten minutes before slicing. A sharp knife briefly held under warm water will cut cleaner slices. Keep the rest well covered in the freezer, and don’t let the parfait thaw and refreeze unnecessarily.
Serve the slices with the cherry sauce alongside or drizzled over them, so the sauce doesn’t overpower the pistachio flavor. A few extra chopped pistachios on top add a little crunch. For a festive dessert, you can make the parfait in the pan ahead of time and keep the sauce chilled separately; then all you need to do just before serving is slice and plate it.