Strawberry buttercream frosting is easy to make with butter, jam, powdered sugar, and a pinch of salt. It’s creamy, fruity, and great for spreading on cakes or piping onto cupcakes. This strawberry frosting with jam goes great on vanilla, chocolate, coconut, and even lemon or lime cakes. Put it on sugar cookies, brownies, and more! It's perfectly pink for Valentine's Day too.