Choose your container: Use a 12–16 oz jar or lidded container. It should have room for stirring and toppings.

Mix the dry base: Add rolled oats, protein powder, chia seeds (if using), and a pinch of salt. Stir to distribute the powder evenly.

Whisk the wet ingredients: In a small bowl or measuring cup, whisk milk, Greek yogurt, vanilla, and sweetener until smooth. This prevents clumps later.

Combine: Pour the wet mixture over the dry oats. Stir thoroughly, scraping the corners, until no dry pockets remain.

Adjust thickness: If it looks too thick, add a splash more milk. It should be pourable but not watery.

Refrigerate: Seal and chill for at least 4 hours, ideally overnight, to let the oats soften and flavors meld.

Stir and top: In the morning, give it a quick stir. Add fruit, nuts, or a spoon of nut butter. If it’s too thick, loosen with a bit of milk.

Enjoy cold or warm: Eat chilled, or warm gently in the microwave in 15–20 second bursts, stirring until just heated through.