Best Ever Chocolate Sponge Cake

Ingredients

• 1 cup butter , melted
• 1 cup white sugar
• 0.5 cups brown sugar
• 1 tablespoon vanilla extract
• 4 eggs
• 0.75 cups all-purpose flour
• 0.5 cups unsweetened cocoa powder
• 1 teaspoon salt
• 0.5 cups buttermilk , or as needed

Instructions

1. 1

   Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish.

2. 2

   Stir butter, white sugar, and brown sugar together in a bowl; add vanilla extract and mix well. Stir eggs, 1 at a time, into butter mixture until smooth.

3. 3

   Sift flour, cocoa powder, and salt together in a separate bowl. Stir flour mixture, alternating with buttermilk, into butter mixture until batter is smooth, adding more buttermilk if needed to thin out batter. Pour batter into the prepared baking dish.

4. 4

   Bake in the preheated oven until a toothpick inserted in the center comes out clean, 40 to 45 minutes.