Time: 25 minutes, plus 2 hours to freeze. The quality of yogurt really matters here; look for brands without unnecessary additives (Straus Family Creamery is our favorite). We prefer a fairly tangy yogurt, so add more sugar if you want yours sweeter. Like most frozen desserts, this fro-yo tastes best when fresh.
32 ounces (about 4 cups) plain nonfat yogurt
About 3/4 cup sugar
How to Make It
In a medium bowl, whisk together yogurt and sugar until sugar dissolves. Taste and add more sugar if you like.
Spoon mixture into an ice cream maker and freeze according to manufacturer's directions. Transfer yogurt to a container and freeze until firm, about 2 hours.
Make ahead: Freeze up to 1 week. Let soften at room temperature about 45 minutes before scooping, or microwave a few seconds until softened.
Note: Nutritional analysis is per 1/2-cup serving.