Ingredients:
- 24 oz. evaporated milk
- 6 cups granulated sugar, divided
- 1 cup unsweetened cocoa powder
- 3 Tbsp. light corn syrup
- 1 tsp. kosher salt, divided
- 2 1/2 cups unsalted butter, softened, divided
- 6 large eggs
- 3 tsp. vanilla extract, divided
- 4 1/2 cups soft winter wheat all-purpose flour (such as White Lily)
- 2 Tbsp. baking powder
- 2 cups whole milk
- Cooking spray
- 9 8-inch round disposable aluminum pans
- 18 8-inch rounds parchment paper
Steps to Make It:
Step 1: Prepare oven and aluminum pans:
Preheat the oven to 425°F. Prepare 9 8-inch disposable aluminum pans with cooking spray and rounds of parchment paper.
Step 2: Prepare icing:
In a large saucepan, whisk together evaporated milk, 3 cups sugar, cocoa powder, corn syrup and 1/4 teaspoon salt over medium heat. Attach a candy thermometer to pot and cook, whisking occasionally, to just at soft ball stage (234-236°F), about 15 minutes.
Step 3: Cream butter and sugar:
Meanwhile, cream 1 1/2 cups (3 sticks) butter and remaining 3 cups sugar using a large heavy duty stand mixer.
Step 4: Add eggs and vanilla:
Add in eggs, 2 at a time, until well incorporated, about 2 minutes. Add in 2 teaspoons vanilla.
Step 5: Sift flour and baking powder:
Sift together flour and baking powder in a medium bowl. Add remaining 3/4 teaspoon salt to the sifted flour mixture.
Step 6: Finish cake batter:
Add flour mixture and milk alternately in 3 additions, beginning and ending with flour mixture. Scrape down sides of mixer bowl with a rubber spatula and mix to incorporate fully, about 1 minute.
Step 7: Add butter to chocolate icing:
Once chocolate icing reaches soft ball stage, reduce heat to simmer and add remaining cup (2 sticks) butter and remaining teaspoon vanilla. Stir to melt butter, about 2 minutes. Maintain a very low simmer until the first round of cake layers are out of the oven.
Step 8: Add battery to aluminum pans:
Using a kitchen scale, add 4 oz. batter to each prepared pan. Using an offset spatula, spread batter as evenly as possible on the bottom of pans.
Step 9: Bake cake layers:
Bake 4 layers at a time for 5 minutes in a preheated oven. Remove from the pan by placing a wire rack on top of the pan and inverting the pan to release the cake layer.
Remove parchment from cake layer, and place first layer on cake stand. Remove icing from heat.
Step 10: Stack cake:
To assemble cake, pour about 1/4 cup hot icing onto first cake layer, just enough to make a very thin layer of icing, but not enough to seep over sides of layer.Repeat with remaining 7 layers.
Step 11: Bake and frost additional layers:
Prepare same cake pans with more cooking spray and rounds of parchment; weigh out 4 oz. batter for each pan, and spread layers as before. Bake 4 layers at a time for 5 minutes in preheated oven; continue layering cake with icing and baked cake layers.
Step 12: pply top layer of icing:
For the top layer of icing, pour enough icing over top to seep over the sides of cake.
Use an offset spatula or small rubber spatula to spread a generous layer of icing to fully cover sides and top of cake. (Icing will be thicker at this point, and you will have some leftovers).
Step 13: Let cake rest:
Let the cake set at least 30 minutes or up to 1 day before slicing.
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