Put the pumpkin puree, homemade date syrup, unsweetened plant-based milk, and pumpkin pie spice into a mini blender. Blend until smooth and creamy.
In a mixing bowl, combine rolled oats and ground flaxseeds.
Pour the pumpkin mixture into the rolled oats mixture. Stir well to combine; allow the mixture to sit for 7 to 8 minutes to thicken.
Divide the mixture into individual mason jars or bowls, and add chopped nuts or other desiredtoppings.
Enjoy these pumpkin spice overnight oats immediately. Or for the best texture, refrigerate for 4 or more hours.
Notes
No blender? If you don't have a blender, no problem. Put all ingredients into a mixing bowl and stir well to combine. Break up any clumps in the mixture with a wooden spoon.
Storage: These overnight oats can be stored in airtight containers, such as mason jars, in the refrigerator for up to 4 days.