To sour milk, add 1 T. vinegar. Let mixture sit for 5 min. Add oatmeal to sour milk and let soak in the bowl while measuring dry ingredients. In separate bowl combine flour, brown sugar, salt, soda, cinnamon and baking powder. Whisk together. Add beaten egg oil and vanilla to oatmeal mixture. Pour oatmeal mixture into flour mixture. Combine just until mixed add raisins and nuts. Pour into prepared muffin tins, fill 2/3 full. Sprinkle with cinnamon and sugar. Bake at 400 for 20 minutes