Place raspberries, yogurt, sugar, vodka and vanilla in a food processor and process until smooth.
Transfer the mixture to an ice cream maker . Freeze according to manufacturer’s directions, or until desired consistency. Add chocolate chips during the last 5 minutes of freezing.
Transfer to an airtight container and freeze until ready to serve.
Can use fresh or frozen raspberries. With less sugar, this frozen yogurt freezes a little more firmly than some. You might want to remove it from the freezer about 5-10 minutes before you are ready to serve it.