Preheat the oven to 375℉ degrees. Grease a 8×8 baking dish with oil.
In a medium bowl, combine oats, pumpkin pie spice, baking powder, and salt. Mix to combine.
Add pumpkin puree, milk, flax eggs, vanilla, and stevia to bowl. Stir to combine.
Spread into the prepared baking dish or cast iron pan. Bake for 30-35 minutes. Oatmeal is done baking when it is puffed up on the edges, set in the middle and top is golden.
Let cool for 5 minutes and drizzle with almond butter. It will be soft at first but will firm up as it cools. Enjoy warm or let cool completely and store in fridge for up to 4 days.