This yellow cake with chocolate frosting is super light and fluffy and easy to make. The cake has the classic yellow color from additional egg yolks with a light vanilla flavor. Plus, the decadent chocolate frosting can be made in only 5 minutes! Slather it all over the cake for a dessert everyone will love!
1cupunsalted butter, softened at room temperature (227g)
⅔cupunsweetened cocoa powder, (65g)
3cupsconfectioners sugar, (340 g)
1tspbrewed coffee, (optional)
1tbspheavy cream, or more if needed
Instructions
Preheat the oven to 350° F and spray 2, 9” round cake pans or 3, 6” cake pans with baking spray and set aside.
In a medium size bowl combine the 2 1/2 cup cake flour, 2 tsp baking powder, 1/4 tsp baking soda, and ½ tsp kosher salt. Whisk until combined.
In the bowl of a hand mixer or stand mixer fitted with the paddle attachment cream the 1 cup butter for 1 minute on medium speed. Scrape down the bowl and add 1 ½ cups sugar.
Mix on medium speed for 2 minutes until light and fluffy.
Scrape down the bowl and add the eggs and yolk one at a time mixing in between. Add the 1 tbsp vanilla extract. Mix for 1 minute on medium speed.
Add in 1/3rd of the dry ingredients, then half of the buttermilk and alternate, starting and ending with the dry ingredients.
Mix well until combined. Do not overmix.
Pour evenly into the cake pans. For 9” pans, bake for 30-40 minutes. For 6” pans check after 25-30 minutes. For 9x13, check after 35-40 minutes. The cake is done when the tops are firm and the sides are pulling away from the pan.
Make the chocolate buttercream
In the bowl of a hand mixer or stand mixer fitted with the paddle attachment, add in the 1 cup butter, and ⅔ cup cocoa powder and mix on medium speed for 1 minute.
Add in the 3 cups of confectioners sugar and mix on medium speed until combined, about another minute.
Add in the coffee if using, and the heavy cream starting with 1 tbsp at a time. Mix on medium- high speed for 2 minutes.
Assemble the cake
Level the tops of the cake with a long serrated knife if they aren't straight enough.
Place one cake on a cake board or serving tray. Spread chocolate frosting over to fill. Top with the other cake layer and frost all over. An offset spatula is the easiest thing to use but you can use a butter knife too.