White Squash Cake

1 c. brown sugar1/2 c. white sugar1/2 c. butter1/2 c. oil3 eggs1 tsp. vanilla1/2 c. greek yoghurt2 1/2 c. SR flour1/2 tsp. allspice1/2 tsp. cinnamon1/2 tsp. salt2 tsp. baking soda4 tbsp. cocoa2 c. squash, grated1
Mix all together and bake in 6 x 10 inch pan at 350 degrees for 25 minutes or until done. When baked, sprinkle powdered sugar over top.