This red velvet cake with buttercream frosting is a classic and delicious dessert that is perfect for any occasion. The cake is made with a combination of buttermilk, vinegar, and cocoa powder, which gives it its signature tangy and slightly chocolatey taste. The cake is then topped with a creamy and sweet buttercream frosting, which perfectly complements the sweetness of the cake. This recipe is easy to make and is sure to be a crowd-pleaser.