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Chocolate Mayonnaise Sheet Cake
Ingredients
  • subheading: For the cake:
  • Butter, for greasing the pan
  • 2 cups ( 242 g) all-purpose flour
  • 1 cup ( 120 g) unsweetened Dutch processed cocoa powder
  • 1 ½ teaspoons baking powder
  • 1 ½ teaspoons baking soda
  • ¼ teaspoon salt
  • ¾ cup ( 177 ml) hot water
  • 2 tablespoons ( 30 g) instant coffee powder or instant espresso powder
  • 2 large eggs
  • 1 cup ( 220 g) sugar
  • ½ cup ( 100 g) brown sugar, lightly packed
  • 1 cup ( 260 g) mayonnaise
  • 1 tablespoon vanilla extract
  • subheading: For the frosting:
  • ½ cup ( 80 g) finely chopped semisweet or bittersweet chocolate
  • ½ cup ( 113 g) unsalted butter
  • 2 tablespoons ( 30 g) unsweetened Dutch processed cocoa powder
  • 1 cup ( 130 g) powdered sugar
  • ½ cup heavy cream
  • subheading: Special Equipment:
  • 9x13-inch baking pan
Steps
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