Texas Sheet Cake Cupcakes Be The First To Review By liz1967 recipe An easy way to get the taste of Texas Sheet Cake, in a cupcake. Frost with your favorite chocolate frosting! Texas Sheet Cake Cupcakes Ingredients 1 box Devils food cake mix.(DH)3 eggs1/2c. oil1/2t. cinnamon1t. vanilla1-1/2c. sour cream1/4c. cold coffee Instructions Add cinnamon to dry cake mix. Add eggs, oil, vanilla, coffee. Beat for about 30sec. just till combined. Add sour cream, beat for 2 min. on med. speed. Bake at 350* 18-21min.