Preheat the oven to 350 degrees F. Grease an 8x8 square baking dish and set aside.
In a medium bowl, mix together the oats, brown sugar, baking powder, salt, and pumpkin pie spice.
In another medium bowl, whisk together the milk, pumpkin, maple syrup, egg, butter, and vanilla extract.
Pour the milk mixture over the oats and stir until combined. Stir in the dried cranberries. Pour oat mixture into prepared baking dish.
Bake for 30-35 minutes, until the top is golden and oatmeal is set. Let cool for 5 minutes. Spoon into bowls and serve warm.
Notes
This baked oatmeal is great reheated in the microwave. I always add a splash of milk after reheating to liven it up. This recipe can easily be doubled for a 9x13 pan.