Banana Trifle

1 (18.25 ounce) box yellow cake mix
1 large box vanilla instant pudding
1 small box vanilla instant pudding
2 (8 ounce) containers Cool Whip
5 bananas

Bake cake in deep pan at 350 degrees F for about 45 minutes. Cool.

When cool, cut into 2 layers. Put 1 layer back into pan. Layer vanilla pudding, bananas and Cool Whip. Repeat with second layer.