Ingredients

  • cooking spray
  • 3 cups unbleached all-purpose flour
  • 1/2 cup unsweetened cocoa powder
  • 2 1/2 teaspoons xanthan gum
  • 2 teaspoons baking soda
  • 1 teaspoon kosher salt
  • 2 cups water
  • 2 cups demerara sugar
  • 3/4 cup vegetable oil
  • 2 tablespoons white vinegar
  • 2 teaspoons vanilla extract

Method

  • Preheat oven to 350 degrees F (175 degrees C). Spray a 9x13-inch baking dish with cooking spray.
  • Whisk flour, cocoa powder, xanthan gum, baking soda, and salt together in a bowl. Add water, sugar, vegetable oil, vinegar, and vanilla extract to dry ingredients; mix until batter is just moistened and pour into the prepared baking dish.
  • Bake in the preheated oven until a toothpick inserted in the center of the cake comes out clean, about 40 minutes.