Preheat oven to 350⁰F. Grease and flour Bunt pan or angel food cake pan. Set aside ¾ cup of crushed pineapple for glaze.
In a large mix bowl combine cake mix, pudding mix, eggs, oil and remaining pineapple. Mix on medium speed for 3 minutes. Pour into prepared pan. Bake for 45 to 55 minutes or until a toothpick inserted in center comes out clean.
in small sauce pan melt butter add the ¾ cup crushed pineapple, all of the juice from the crushed pineapple can, and powdered sugar; stir until sugar is dissolved. Spoon glaze over cooled cake.
Do not drain the crushed pineapple. You need to divide the pineapple and the juice.