Prepare the ingredients: Gather all the ingredients. If using frozen pumpkin puree, make sure to thaw it beforehand.
Mix the base: In a bowl, combine 1/2 cup rolled oats, 1/4 cup almond milk, 1/4 cup pumpkin puree, and 1/4 cup yogurt. Stir until well mixed.
Add flavor: Sprinkle in 1/2 teaspoon pumpkin pie spice and 1-2 teaspoons of maple syrup (or honey). Stir to blend the spices evenly throughout the mixture.
Add chia seeds: For a thicker texture, add 1 tablespoon of chia seeds and mix well.
Transfer to a container: Pour the mixture into a jar or airtight container, cover with a lid, and refrigerate overnight or for at least 6-8 hours.
Morning finishing touches: In the morning, remove the oats from the fridge and stir them to achieve a smooth consistency. If the oats are too thick, add a splash of milk to adjust the texture.
Garnish: Top with chopped walnuts for a crunchy finish and a small dollop of whipped cream for a dessert-like touch (optional).
Serve: Enjoy your flavorful pumpkin pie oats straight from the fridge, or warm them up in the microwave for a cozy breakfast.