In a medium-sized mixing bowl combine the lemon cake mix, instant vanilla pudding, vegetable oil, eggs, and all purpose flour stir to combine. Then add the soda and mix by hand until the batter is smooth.
Bake at 350 degrees for 20-25 minutes, if using 9-inch rounds. Refer to the box of cake mix for other cooking times. Cool the cake completely before frosting.
Place 2 ounces of butter in a medium-sized pan over medium heat. Add 20 ounces of crushed pineapple, sugar, and cornstarch. Cook until hot and bubbly. Then add the coconut. Allow the frosting to cool, then spread over cooled cake.
This is a fun cake to make, you can use Mountain Dew or another favorite soda of yours, and a boxed cake mix. Source Virginia McDowell. Jefferson City, Mo. 1991.