Preheat oven to 375 degrees F. Grease 8x8 inch pan.
In a medium bowl, mix together all the oatmeal ingredients - oats through melted butter.
In a small bowl, mix together the additional 2 Tbsp melted butter, brown sugar and cinnamon.
Add half the batter into prepared baking dish.
Drizzle half of the butter, sugar, cinnamon mixture over half the batter.
Top with remaining oatmeal mixture.
Drizzle remaining butter, sugar, and cinnamon mixutre over the top. Use a toothpick or knife and swirl the cinnamon mixture into the top of the oatmeal.
Bake for 25 - 30 minutes or until the center is set and edges are lightly brown.