Add the rolled oats, milk, yogurt, sweetener, and vanilla extract, to a jar or small bowl. Stir until well mixed.
If making the apple cinnamon version, stir in the diced apple, cinnamon, nutmeg, and walnuts, if using.
Cover and refrigerate for at least 4 hours or overnight, until the oats are soft and creamy.
Stir before eating and add walnuts or extra diced apples, if desired.
Notes
Use Rolled Oats, Not Quick Oats: Old fashioned rolled oats soften overnight while keeping their texture. Quick oats tend to break down and become too soft.
Stick to the Base Ratio: For consistent results, use equal parts oats and milk, then add yogurt for creaminess. Adjust slightly if you prefer thicker or thinner oats.
Stir Well Before Chilling: Make sure everything is fully mixed so the oats hydrate evenly and don’t clump at the bottom.
Refrigerate Long Enough: Let the oats chill for at least 4 hours, but overnight gives the best texture.
Warm If You Prefer: Overnight oats can be eaten cold or warmed. Remove the lid and heat in a microwave safe container, stirring before serving.
How To Store And Meal Prep Overnight OatsOvernight oats are easy to prepare in advance and can be made as a single serving or scaled up for meal prep. Simply double, triple, or multiply the ingredients based on how many servings you want to make.After assembling the oats, cover and refrigerate them in an airtight container. Overnight oats will stay fresh in the refrigerator for up to 4 days. Stir before serving and add any toppings just before eating for the best texture.