Choose your container. Use a 12–16 ounce jar or a small lidded container.
You want a little extra room for stirring and toppings.
Start with dry ingredients. Add rolled oats, chia seeds, pumpkin pie spice, cinnamon (if using), and a pinch of salt. Stir to evenly coat the oats in spices.
Whisk the wet ingredients separately. In a small bowl, mix milk, pumpkin puree, maple syrup, and vanilla until smooth. This helps prevent clumps and keeps the flavors balanced.
Combine and stir. Pour the pumpkin mixture over the dry ingredients.
Stir well, scraping the bottom and sides so everything is moistened evenly.
Adjust thickness. If it looks very thick, splash in 1–2 extra tablespoons of milk. If you like it thicker, add another teaspoon of chia seeds.
Chill. Cover and refrigerate for at least 4 hours, but overnight is best for the creamiest texture.
Stir and top. In the morning, give it a good stir. Add Greek yogurt for extra creaminess, swirl in almond butter, and finish with chopped pecans, pepitas, or a sprinkle of cinnamon.
Serve your way. Enjoy cold straight from the jar, or warm gently in the microwave in 20–30 second bursts, stirring between each, until it’s just heated through.