PINEAPPLE BAR CAKE

1 1/2 c. flour
1 tsp. baking powder
1 tsp. baking soda
1/2 c. margarine, melted
2 c. sugar
3 eggs
1 (14 oz.) can crushed pineapple,
don't drain
1 c. walnuts, chopped

Mix dry ingredients and set aside. Then mix margarine, sugar, eggs, pineapple, and nuts. Gradually add dry mixture to moist ingredients. Blend well. Bake in 9 x 13 inch greased and lightly floured pan. Bake at 350 degrees for 35 minutes or until done.