Name: Hot Chocolate Layer Cake
Ingredients: 6 oz. 3/4 cup unsalted butter; extra to grease the pans; 13-1/2 oz. 3 cups unbleached all-purpose flour (I recommend weighing it); 3/4 cup canola oil; 4-1/2 oz. bittersweet chocolate (finely chopped); 3 cups granulated sugar; 2-1/4 oz. 3/4 cup natural unsweetened cocoa powder; 3 large eggs (at room temperature); 3/4 cup buttermilk (at room temperature (use milk with a splash of vinegar or lemon juice if you don’t have buttermilk)); 2 Tbs. pure vanilla extract; 2-1/2 tsp. baking soda; 1/2 tsp. kosher salt; 1 1/2 cup butter (softened); 6 1/2 cup confectioners’ sugar (more if needed); 2 cups cocoa powder; 3/4 tsp vanilla extract; 3/4 cup milk