Created by Mikekey on November 4, 2013
Step 1: Preheat oven to 350F. Grease a 9 x 13-inch baking pan.
Step 2: Mix flour, baking powder, baking soda, cinnamon and lemon zest together.
Step 3: Add oil and blend.
Step 4: Mix in remaining ingredients, one at a time, until well blended.
Step 5: Spread batter into prepared baking pan.
Step 6: Bake 1 hour, or until toothpick inserted comes out clean.
Step 7: Cool completely in pan on wire rack. Dust with powdered sugar and cinnamon if desired. Cut into squares and serve.