Chocolate Peanut Butter Mug Cake Decadent Chocolate Peanut Butter Delight in a Mug Ingredients: 4 tablespoons all-purpose flour 4 tablespoons granulated sugar 2 tablespoons unsweetened cocoa powder 1/8 teaspoon baking powder 1/8 teaspoon salt 3 tablespoons milk 2 tablespoons vegetable oil 1 teaspoon vanilla extract 1 tablespoon peanut butter (plus extra for topping) Optional: chocolate chips for extra indulgence