Lunch Box Squares - cooking recipe

Ingredients

1/2 c. butter or margarine
1/2 c. oil (i.e. Crisco)
1 3/4 c. sugar
2 eggs
1 tsp. vanilla
1/2 c. buttermilk*
2 1/2 c. flour
1 tsp. baking soda
1/2 tsp. baking powder
1/2 tsp. salt
1/4 c. cocoa
1 tsp. cinnamon
2 c. grated zucchini, do not peel

Preparation

*Buttermilk:
To 1 teaspoon vinegar, add milk to make 1/2 cup.