Easy Pineapple Upside-Down Cake
["1/2 stick butter, melted", "1/2 c. brown sugar", "1 can crushed pineapple with juice", "1 yellow cake mix, mix as directed"]
["Layer butter, sugar and pineapple evenly in cake pan. Pour cake mix evenly over top. Bake as directed on box."]
["butter", "brown sugar", "pineapple", "yellow cake"]