Monday, January 9, 2012

vanilla sheet cake with malted-milk-chocolate frosting

the goods:

3 and 3/4 sticks unsalted butter, room temperature, plus more for pan
3 cups all-purpose flour, plus more for pan
1 and 1/2 cups sugar
4 large eggs
1 tablespoons baking powder
1 teaspoon baking soda
1 and 1/4 cups buttermilk
1 and 1/2 teaspoons pure vanilla extract
1/2 cup boiling water
1/4 cup unsweetened cocoa powder
1 and 1/2 cups malted milk powder
3/4 pound milk chocolate, melted and cooled
sprinkles (optional), for serving

Preheat oven to 350 degrees. Lightly butter and flour a 9-by-13-inch baking pan. In a large bowl, using an electric mixer, beat 1 and 1/2 sticks (3/4 cup) butter and sugar on high until light and fluffy, about 5 minutes. Beat in eggs, one at a time, until combined. In a large bowl, whisk together flour, baking powder, baking soda, and 3/4 teaspoon salt. With mixer on low, add flour mixture to butter mixture in three additions, alternating with two additions buttermilk, and beat to combine, scraping down bowl as needed. Beat in vanilla. Transfer batter to pan and smooth top.

Bake until cake is golden, puffed, and toothpick inserted in center comes out clean, 35 minutes, rotating pan halfway through. Let cool completely in pan on wire rack. Meanwhile, in a medium bowl, whisk together cocoa and malted milk powders. Add boiling water, whisk until smooth, and let cool. Using mixer, beat 2 sticks (1 cup) plus 2 tablespoons butter on high until smooth. Add cocoa mixture; beat until combined. Add chocolate and pinch of salt. With mixer on medium-high, beat until frosting is smooth and peaks form, 3 minutes.

Frost cake; top with sprinkles if desired.

Slice (or just grab a bunch of forks) and dig in!

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