Decadent Chocolate Layer Cake

Ingredients

• 2 tablespoons cocoa powder (1 tablespoon Dutch and 1 tablespoon Dark)
• 2 cups boiling water
• 3/4 cup plus 1 tablespoon granulated sugar
• 1 ounce chocolate chips
• 4 tablespoons cornstarch
• 3 tablespoons cold water
• 1/4 teaspoon kosher salt
• 1 teaspoon pure vanilla extract
• 2 tablespoons unsalted butter (or vegan baking stick)
• 1.5 cups gluten-free all-purpose flour
• 1.5 cups granulated sugar
• 3/4 cup cocoa powder (1/2 cup Dutch cocoa and 1/4 cup dark)
• 1.5 teaspoons baking soda
• 3/4 teaspoon baking powder
• 3/4 teaspoon salt
• 4 heaping tablespoons cornstarch mixed with 6 tablespoons of water
• 1 cup milk
• 1 tablespoon white vinegar
• 1 cup warm water
• 4 tablespoons vegetable oil
• 3/4 cup unsalted butter (or vegan baking stick, room temperature)
• 3.5 cups confectioners' sugar
• 1 cup cocoa powder (1/2 cup natural unsweetened or Dutch and 1/2 cup dark)
• 2 teaspoons pure vanilla extract
• 1/2 cup room temperature water