Winner of 4 recipes tested by The Kitchn. “ Cupcake Project’s detailed, multi-layered, scientific approach really paid off. Every decision feels purposeful: sifting the dry ingredients to remove any clumps, using butter for flavor and oil for tenderness, adding sour cream and egg yolks for moisture and fat, calling for melted chocolate and cocoa powder to help boost the chocolate flavor. Plus, her buttercream frosting recipe is creamy and smooth, and the perfect complement to the cupcakes. This is the recipe I’ll use from now on.”