Preheat oven to 450 degrees. Melt 1 tablespoon of butter in a cast iron pan (I did this by placing the pan in the oven while it preheats). Mix all ingredients together in a mixing bowl until frothy. Do not over beat. Pour batter into the pan and cook for 17 minutes.
Slice and serve with fruit and maple syrup.
You can use a mixture of oat flour and whole wheat pastry flour or use all whole wheat. I find that whole wheat pastry flour is much less dry that whole wheat.