Ingredients

  • 1 1/2 cups all-purpose flour
  • 5 tablespoons unsweetened cocoa powder
  • 1 cup sugar
  • 1 teaspoon baking soda
  • 1/2 teaspoon kosher salt
  • 1 teaspoon distilled white vinegar
  • 1 teaspoon vanilla extract
  • 5 tablespoons canola oil
  • 1 cup water
  • 1 cup confectioners sugar
  • 2 tablespoons unsweetened cocoa powder
  • 2 tablespoons unsalted butter, at room temperature
  • 1/2 teaspoon vanilla extract
  • 1 tablespoon milk, or as needed

Method

  • Prepare a medium heat fire (a 4-second fire) in a wood-fired oven or cooker, or prepare a campfire grill for cooking over indirect heat.
  • Sift the flour, cocoa powder, sugar, baking soda, and salt into a greased 8-inch-square cake pan.
  • Make three wells in the dry ingredients.
  • Pour the vinegar into one, the vanilla into another, and the oil into the third.
  • Pour the water over all and stir until smooth.
  • Level out the surface and cover with aluminum foil.
  • Bake for 35 minutes, or until a toothpick inserted in the center comes out clean.
  • Set aside to cool.
  • To make the frosting, stir the sugar and cocoa powder together in a bowl.
  • Beat in the butter and vanilla until smooth.
  • Stir in just enough milk to make the frosting soft and spreadable.
  • Spread over the cake and let set for 30 minutes before cutting and serving.