This old-fashioned ice cream has a deep chocolate flavor and cherry sauce layered with the chocolate mixture before freezing. It's smooth and velvety, and requires an ice cream maker.
Chop 6 ounces semisweet chocolate and place in a medium bowl.
In a medium heavy saucepan, combine 1 cup sugar, ½ cup unsweetened cocoa powder, 1 ½ cups heavy cream and 1 cup whole milk with a whisk. Over medium heat, bring the mixture to a boil, stirring occasionally.
In the meantime, whisk 3 egg yolks until smooth in a large bowl.
Pour the hot milk and cream mixture very slowly into the beaten yolks, whisking constantly. Do so slowly so you don’t ‘cook’ and curdle the eggs.
Return the mixture to the saucepan and cook over medium-low heat, stirring constantly with a wooden, metal or silicon spoon, until it thickens and coats the back of a spoon. If you slide your finger, you should be able to leave a streak that doesn't form back quickly. If you have a thermometer, the mixture has to reach 170°F (79°C). Don’t let it curdle or scorch.
Remove from the heat and stir in the chopped chocolate. Continue whisking until the chocolate is completely melted.
Strain the mixture with a fine mesh sieve into a clean bowl.
Cover the custard with plastic wrap and refrigerate it for at least three hours or overnight if your ice cream machine instructs it should very cold before churning.
Before churning, beat the custard with an electric mixer until thick and fluffy. Churn according to the ice cream maker instructions.
Transfer to a freezer-safe container (metal is great), layering it with the cherry sauce. Make two layers of each and lightly swirl them. Freeze until firm, about 4 hours and up to a month.
For the cherry sauce:
Put 1 pound fresh cherries in a saucepan, add 2 tablespoons brown sugar, and cook, stirring for 2 minutes.
Add 1 tablespoon water and 1 tablespoon cassis liqueur, if using. If you're not using the liqueur, increase the water by 2 tablespoons.
Cook for about 5 minutes over medium-low heat, until the cherries soften a bit and the sauce is syrupy.
Keep refrigerated and use with the ice cream.
Notes
You can also freeze the chocolate ice cream alone and serve it with the cherry sauce on top.