- 1 cup fat-free milk
- 1 cup half-and-half
- 3/4 cup white sugar
- 1/4 cup unsweetened cocoa powder
- 3 ounces bittersweet chocolate
- 2 tablespoons coffee-flavored liqueur (such as Kahlua®)
- 2 teaspoons espresso powder
- 1 1/2 bananas, mashed
- 1 cup nonfat plain yogurt
- Mix milk, half-and-half, sugar, cocoa powder, bittersweet chocolate, coffee-flavored liqueur, and espresso powder together in a heavy saucepan; bring to a simmer, stirring often, until heated through, about 5 minutes. Remove saucepan from heat and stir in bananas. Refrigerate until completely cooled, at least 30 minutes.
- Whisk yogurt into banana mixture; transfer to the bowl of an ice cream maker. Follow manufacturer's instructions for making frozen yogurt.