How to Make It
Preheat oven to 375°F. Process queso fresco, mozzarella, tapioca starch, baking powder, sugar, and salt in a food processor until well combined, about 15 seconds. With food processor running, add eggs and milk. Process until dough forms a ball, about 20 seconds.
Shape dough into 10 (1 3/4-oz.) balls, and place on a parchment paper-lined baking sheet, leaving 2 inches between balls. Bake in preheated oven until golden brown and puffed, about 22 minutes. Serve immediately.