Sift 3 c. flour, 1 tsp baking soda, 1 tsp baking powder, 1 tsp salt, ½ c. carob or cocoa powder. Beat together ½ c. oil, 1 ½ c. sugar, 1 egg and 1 tsp vanilla. A little at a time, add and mix sifted ingredients and 1 ½ c. milk to the other liquid ingredients. Then add 4 c. grated beets. Pour into oiled and floured 9x13 pan and bake @ 350 deg. 45 min. or until done. Cool and frost.