Mini Banana Nut Muffins

1 (18 1/4 ounce) box yellow cake mix
1 (4 ounce) package instant banana pudding mix
1/2 cup water
1/2 cup vegetable oil
2 ripe mashed bananas
4 eggs
Chopped walnuts (I don't use many)
1 cup chopped walnuts I chop them really small because I use the mini muffin pan

Mix first 5 ingredients together well and add chopped walnuts.
Lightly spray muffin tin

Place batter in  cupcake tins and fill 3/4 full.
Bake at 350° for about 20 minutes or until tests done with a toothpick.
If you are using a mini muffin pan like I did they will get done really quick