Blackberry buttercream frosting is a delicious and vibrant frosting that adds a burst of fruity flavor to any cake or cupcake. Made with fresh blackberries, butter, powdered sugar, and vanilla extract, this frosting is creamy, smooth, and perfectly sweet. The blackberries give it a beautiful purple color and a tangy taste that pairs well with a variety of cake flavors. Whether you're making a birthday cake or just want to add a special touch to your cupcakes, this blackberry buttercream frosting is sure to impress.