Preheat oven per cake mix box directions. Spray small oven-safe bowls with nonstick spray.

Mix cake batter according to package instructions.

Fill bowls two-thirds full with batter.

Place bowls on baking sheet and bake until a toothpick inserted in center comes out clean.

Cool in bowls 10 minutes, then transfer to wire rack to cool completely.

Spread white frosting evenly over cooled cakes.

Cover frosting completely with dot sprinkles, pressing gently to adhere.

Serve immediately or store until party time.