Chocolate Cupcakes with Caramel Frosting without icing

1 1/2 cups flour 1 cup unsweetened cocoa 1 1/4 teaspoons baking soda 1 1/4 teaspoons baking powder 1 teaspoon salt 2 cups sugar 3/4 cup hot water 3/4 cup milk[...]

2/3 cup nutella 1 cup all-purpose flour 1 1/2 cups cake flour 1 1/2 cups unsweetened cocoa powder 2 teaspoons baking soda 1 teaspoon baking powder 3/4[...]

3/4 cup unsweetened cocoa powder 1 1/2 cups all-purpose flour 1 1/2 cups sugar 1 1/2 teaspoons baking soda 3/4 teaspoon baking powder 3/4 teaspoon salt 2[...]