Cupcake Cookies
Ingredients:
- 1 cup unsalted butter, softened
- 1 cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 2 1/2 cups all-purpose flour
- 1/2 teaspoon baking powder
- 1/4 teaspoon salt
- 1/2 cup milk
- 1/2 cup rainbow sprinkles