1 1/2 cups cake flour
1 1/2 teaspoons baking powder
1/4 teaspoon salt
1/2 cup unsalted butter, at room temperature
1 cup granulated sugar
1 large egg + 1 egg white
2 tablespoons vegetable oil
3 teaspoons vanilla extract
1/2 cup whole milk
1/3 cup red white and blue sprinkles

CREAM CHEESE FROSTING
2 8- ounce blocks cream cheese
1/2 cup unsalted butter
2 1/2 cups powdered sugar
1 teaspoon vanilla extract
red white and blue sprinkles, for sprinkling
Pop Rocks candy, for topping (optional, for the "firecracker" feel