Ingredients:
– 2 cups all-purpose flour
– 1 cup granulated sugar
– 1 cup buttermilk
– 1/2 cup unsalted butter, softened
– 1/4 cup vegetable oil
– 2 large eggs
– 2 tablespoons black cocoa powder
– 1 tablespoon unsweetened cocoa powder
– 1 teaspoon baking powder
– 1/2 teaspoon baking soda
– 1/2 teaspoon salt
– 1 tablespoon white vinegar
– 1 teaspoon vanilla extract
– Black food coloring (gel or paste)
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