Combine the rolled oats, pumpkin puree, milk, maple syrup, cinnamon, nutmeg, and cloves in a mixing bowl. Whisk together until the mixture is smooth and well integrated, with no lumps remaining.
Seal the bowl with a lid or plastic wrap and refrigerate overnight, allowing the oats to soak up the flavors and develop a creamy texture.
The next morning, remove the oats from the refrigerator and give them a quick stir. The mixture should be thickened and creamy, with a fragrant pumpkin spice aroma filling the air.
Divide the pumpkin spice overnight oats into bowls or jars. Add your favorite toppings like fresh fruit, nuts, or seeds for extra flavor and crunch.
Enjoy your nourishing and flavorful pumpkin spice overnight oats as a cozy breakfast or snack, with a spoonful of warmth in every bite.