Ingredients

• cooking spray
• 1 (18.4 ounce) package brownie mix
• ¼ cup all-purpose flour
• 1 cup chocolate chips
• ¼ cup vegetable oil
• 2 large eggs
• 1 tablespoon multicolored candy sprinkles, or to taste
• 1 ½ cups powdered sugar
• ½ cup unsalted butter, softened
• ½ teaspoon vanilla extract
• ½ (16 ounce) tub marshmallow creme