Chocolate Cake with cinnamon

1 (18 1/4 ounce) betty crocker chocolate cake mix, prepare with 3 eggs 1 1/4 cups water or 1 1/4 cups milk 1/3 cup vegetable oil 2/3 cup sour cream 1 (40 g)[...]

2 1/2 cups brown sugar 1 cup dark cocoa 2 cups flour 1 3/4 teaspoons baking soda 1 1/2 teaspoons baking powder 1 teaspoon salt 2 eggs 1 1/4 cups milk 3/4 cup[...]

1/2 cup butter 1/4 cup cocoa 1 cup water 1/2 cup oil (veggie or canola) 2 cups flour 2 cups sugar 2 eggs (at room temp) 2 teaspoons cinnamon (best you can[...]