For batter amounts, see Cook's Note. For the 20-, 14-, and 6-inch tiers, you will need to fill and bake 2 of each size of pan; for the 18- and 9-inch tiers, you will need to fill and bake three of each size of pan. Trim layers to be 1 1/4 inches high.



Ingredient Checklist


Instructions Checklist
  • Preheat oven to 350 degrees. Coat cake pans with cooking spray. Line bottoms with parchment paper; coat with cooking spray. Dust pans with cocoa, tapping out excess.

  • Sift cocoa, flour, sugar, baking soda, baking powder, and salt into the bowl of a mixer fitted with the paddle. Add eggs, egg yolk, warm water, milk, oil, and vanilla; beat on low speed until smooth and combined, about 3 minutes.

  • Divide batter among lined pans. Bake until a cake tester inserted into centers comes out clean, about 35 minutes for 9-inch pan (longer for larger sizes). Let cool in pans on wire racks 25 minutes. Turn cakes out onto racks, remove parchment, and re-invert cakes so they are right side up; let cool completely.

Cook's Notes

Batter amounts for each 3-inch-deep pan (fills pans halfway): 20-inch, 24 cups; 18-inch, 21 cups; 14-inch, 15 cups; 9-inch, 7 cups; 6-inch, 3 cups