Banana Marshmallow Squares

1 Package Yellow cake mix
1/2 Cup Butter
2 Eggs
1 Cup Nuts -- chopped

Filling:
3 1/4 Cups Miniature marshmallow
1 Small Instant vanilla pudding
2 Ripe bananas -- mashed

Crust: Preheat oven to 350~. Grease 9x13" pan. In large bowl combine cake mix, butter, eggs and nuts. Blend well. Press 1/2 into bottom of pan; reserve remaining for topping. FILLING: In double boiler, melt marshmallows, stirring constantly, until smooth. Add dry pudding mix and bananas to melted marshmallows. Spread evenly over dough. Crumble remaining dough over filling. Bake 20-25 minutes or until dough is golden brown.