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Ingredients
- 2 cups all-purpose flour
- 1 cup granulated sugar
- 2 teaspoons baking soda
- 1/4 cup unsweetened cocoa
- 1 cup mayonnaise
- 1 cup water
- 1 1/2 teaspoons vanilla extract, divided
- 1/4 cup (1/2 stick) butter, softened
- 2 cups confectioners' sugar
- 2 tablespoons milk
Preparation
Step 1
Preheat the oven to 350 degrees F. Coat a 9x13" baking dish with nonstick cooking spray, and flour lightly.
In large bowl, combine flour, granulated sugar, baking soda, cocoa, mayonnaise, water, and 1 teaspoon vanilla extract; blend with an electric beater on medium speed until well combined.
Pour batter into baking dish. Bake for 25 to 30 minutes, or until wooden toothpick inserted in center comes out clean. Let cool completely.
Meanwhile, in medium bowl, beat butter until creamy. Add confectioners' sugar, milk, and remaining 1/2 teaspoon vanilla extract; blend until smooth. Frost cooled cake.