chocolate marble sheet cake

How To Make chocolate marble sheet cake

• 1

  Preheat oven to 325°. Beat butter and 1 1/2 cups sugar at medium speed with a heavy-duty electric stand mixer 4 to 5 minutes or until creamy. Add eggs, 1 at a time, beating just until blended after each addition. Beat in vanilla extract.
• 2

  Sift together flour, baking powder, and salt. Add to butter mixture alternately with half-and-half, beginning and ending with flour mixture. Beat at low speed just until blended after each addition, stopping to scrape bowl as needed.
• 3

  Spoon 1 1/4 cups batter into a 2-qt. bowl, and stir in cocoa, 3 Tbsp. hot water, and remaining 1/4 cup sugar until well blended.
• 4

  Spread remaining vanilla batter into a greased and floured 15- x 10-inch jelly-roll pan. Spoon chocolate batter onto vanilla batter in pan; gently swirl with a knife or small spatula.
• 5

  Bake at 325° for 23 to 28 minutes or until a wooden pick inserted in center comes out clean. Cool completely in pan on a wire rack (about 1 hour). Spread top of cake with Mocha Frosting.
• 6

  For the mocha frosting: Whisk together sugar and cocoa in a medium bowl. Combine coffee and vanilla. Beat butter at medium speed with a heavy-duty electric stand mixer until creamy; gradually add sugar mixture alternately with coffee mixture, beating at low speed until blended. Beat in half-and-half, 1 Tbsp. at a time, until smooth and mixture has reached desired consistency.
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