1/2 cup (80g) sprinkles, plus more for topping
1 tsp. pure vanilla extract
1 large egg, at room temperature
3/4 cup (150g) granulated sugar
1/2 cup (115g) unsalted butter, softened to room temperature
1/4 tsp. salt
1 and 1/2 teaspoons baking powder
1 and 1/2 cups (190g) all-purpose flour (spoon & leveled)