Preheat oven to 350°F.
Combine the topping ingredients in a small bowl. Mix well and set aside.
In a large bowl combine oats, brown sugar, cinnamon, baking powder, and salt.
Add in eggs, milk, butter, and vanilla extract. Mix well and spread in a greased 9×9 pan.
Sprinkle topping over oatmeal and bake 40–45 minutes.
Serve warm, drizzled with cream if desired.
