Prep time: about 90 minutes What you need: 2 eggs 1¾ c. sifted flour 2 tsp. baking powder ¼ tsp. baking soda ½ tsp. salt 1/3 c. vegetable oil 2/3 c. sugar 1 c. mashed bananas (about 3 bananas) Equipment and supplies: oven (you’ll need help from your adult assistant) measuring cups and spoons mixer …