Choose your container. Use a jar or airtight container that holds at least 12 ounces.
This gives the oats room to swell and leaves space for toppings.
Add dry ingredients. To the jar, add 1/2 cup rolled oats, 1 teaspoon chia seeds (optional), 1/4 teaspoon cinnamon, and a tiny pinch of salt. The salt sharpens the maple flavor and balances sweetness.
Pour in the liquids. Add 1/2 cup milk, 2–3 tablespoons Greek yogurt (optional), 1 tablespoon pure maple syrup, 1–2 teaspoons brown sugar, and 1/4 teaspoon vanilla extract.
Stir well. Mix thoroughly so the chia seeds don’t clump and the sugar dissolves. Make sure oats are fully submerged.
Seal and chill. Cover and refrigerate at least 4 hours, but overnight is best for the creamiest texture.
Stir and adjust in the morning. Give the oats a good stir.
If too thick, add a splash of milk. If you prefer sweeter, add a touch more maple syrup.
Top and serve. Finish with banana slices and chopped pecans, or go simple with just a dusting of cinnamon. Eat cold or warm gently in the microwave for 30–45 seconds if you like it cozy.