Ingredients

• 1 ½ cups all-purpose flour
• ½ cup white sugar
• 3 tablespoons unsweetened cocoa powder
• 3 teaspoons baking powder
• ½ teaspoon salt
• 1 cup milk
• 2 large eggs
• 4 tablespoons butter, melted
• 1 tablespoon butter, softened
• ¾ cup confectioners' sugar
• ½ teaspoon vanilla extract
• 1 teaspoon milk
• nonstick cooking spray