Mix in a large bowl and set aside:

1 1/2 cups flour
1 cup oatmeal
1 Tbsp. baking powder
1/2 tsp. cinnamon
1/4 tsp. salt

Mix together, then add to dry until blended:

2 eggs (slightly beaten)
1 1/2 cups milk
6 Tbsp. butter (melted)
2 Tbsp. brown sugar

Heat waffle iron and make waffles.