- Preheat the oven to 375℉ degrees. Grease an 8×8 baking dish with oil.
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In a medium bowl, combine oats, pumpkin pie spice, baking powder, and salt. Mix to combine.
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Add pumpkin puree, milk, eggs, vanilla, and maple syrup/honey to bowl. Stir to combine.
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Spread into the prepared baking dish. 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.
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Let cool for 5 minutes before slicing. It will be soft at first but will firm up as it cools. Enjoy warm topped with yogurt, a splash of milk, a drizzle of honey or maple syrup, fruit, whipped cream or simply on its own. Let cool completely and store in an air-tight container fridge for up to 4 days.