Low fat chocolate cake

Combine 1/3 cup powdered oats, 1/3 cup all-purpose flour, 1 cup brown sugar,1 teaspoon baking soda 3/4 teaspoon baking powder, 1/4 teaspoon cinnamon powder, 1/4 teaspoon salt, 1/2 cup cocoa powder, 1 cup greek yoghurt, 1 egg,1 teaspoon vanilla, 1 cup shredded beetroot. Bake at 350 degree F for 20 minutes.