Banana-Walnut Snack Cake

1 package snack cake mix (see above)

1 egg

1/3 cup vegetable oil

1/2 cup mashed -- ripe banana

1/2 cup buttermilk -- milk, or water

1/2 cup chopped walnuts

Preheat oven to 350 degrees F (175 degress C). Pour snack cake mix into an ungreased 8 or 9 inch square baking pan. In a small bowl, combine remaining ingredients, beating with a fork to blend. Stir into snack cake mix until blended. Bake 30 to 35 minutes in preheated oven until a wooden pick inserted in center comes out clean. Cool on a rack. Makes 9 servings. Place a paper doily on the hot cake, dust with powdered sugar, then remove the doily.