Pineapple Upside Down Cake

1 Duncan Hines Pineapple cake mix (or white cake mix and replace water with pineapple juice)
1 can of crushed pineapple 
1 cup brown sugar 
1/2 cup butter

Drain pineapple and SAVE ALL THE JUICE. Melt butter and add the brown sugar to the butter. Spread evenly in a 9x13 pan. Sprinkle drained pineapple evenly over the brown sugar/butter mix. 

In a bowl, mix the cake mix as directed except USE THE PINEAPPLE JUICE that you saved in place of the water called for (in the cake mix).  Pour cake mix over the brown sugar/butter/pineapple mix and bake as directed on the box. Once done, put a cookie sheet over your pan and flip the cake upside down.

Recipe and picture from Fun Facts and Tips for Everyone.