Gather the ingredients - * Pineapple tidbits * Crushed pineapple * Yellow cake mix * Butter * Brown sugar
Dump both cans of pineapple into the bottom of the pan, mixing to evenly distribute both types of pineapple.
Add the cake mix in an even layer on top of the pineapple.
Sprinkle the brown sugar on top.
Drizzle the melted butter evenly over the whole cake.
Bake in the over for 45-50 minutes, or until the top is golden and the filling is bubbly.