This red velvet cake with mascarpone frosting is a rich and indulgent dessert that is perfect for any special 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 tangy mascarpone frosting, which perfectly complements the sweetness of the cake. This recipe is easy to make and is sure to impress anyone who loves a rich and indulgent dessert.