In a medium sized mixing bowl, combine the rolled oats with the baking powder, salt, and cinnamon.
In a separate large mixing bowl, whisk together the eggs, oil, milk, vanilla paste, maple syrup, and pumpkin purée.
Pour the rolled oat mixture directly into the pumpkin mixture and combine using a spatula.
Preheat the oven to 375º and line a 9x9 pan with parchment paper. Pour the oatmeal mixture into the pan and spread out with the spatula. Bake for 25-30 minutes or until the center is just set.
Let cool for 10 minutes, then slice and serve with a dusting of powdered sugar and a drizzle of maple syrup.
Notes
Use rolled oats, not quick or instant oats. There are different oats for a reason! The rolled oats will bake up different than quick oats or even steel cut oats, which will take much longer. The rolled oats hold up well in the bake too.Use enough liquid so that the oats do not get chewy or become dry. A good rule of thumb is 2 cups of oats to about 1 ½ to 2 cups of milk.I suggest using maple syrup to sweeten this up instead of adding granulated sugar. You could also add in honey or some brown sugar instead.Keep an eye on the timing as it bakes. The first go round with this I baked it too long and it became crumbly and dry. It should be just set and not jiggly when taken out of the oven. It will continue to bake as it cools.