The first stir after a night in the fridge turns this little container into something much thicker than it looked the evening before. Cookie pieces folded through the oats soften into dark, chocolatey flecks, while the crumb added just before eating still has a bit of texture. That contrast is what I enjoy most about Oreo overnight oats: it tastes like a treat, but the oats and yogurt make it filling enough for breakfast.
Old-fashioned rolled oats are the right fit here because they soften during the long chill without losing all their chew. Greek yogurt gives the mixture a creamy, pleasantly tangy base, and a little maple syrup rounds it out without burying the cookie flavor. Stir everything together, tuck the container into the refrigerator, and let time do the work. The result is cool, creamy oats with chocolate-cookie bits in every spoonful.
Kitchen Note
Use a lidded container that holds at least 12 ounces. A little extra room makes it much easier to stir the oats and yogurt together without sloshing milk over the sides.
Save these Oreo overnight oats for a no-cook breakfast with creamy oats and chocolate-cookie pieces ready in the morning.
Why Some Oreo Bits Belong in the Oats—and One Belongs on Top
When all the crushed cookies sit on top, the oats underneath stay plain and the first few bites get most of the chocolate. Folding some into the mixture before chilling spreads their flavor throughout the jar. As they rest against the oats and yogurt, those pieces soften and become part of the creamy texture rather than staying crisp.
The cookie saved for the finish does a different job. Added just before serving, it gives you a more distinct cookie bite against the soft oats. Crush the cookies into small pieces, not a fine powder: powder disappears into the mixture, while pieces leave little pockets of chocolate and cream flavor. The split isn’t fussy; it gives the finished breakfast two textures without adding another topping or extra prep. If you prefer a softer, more blended result, you can fold all the cookie pieces into the oats instead, knowing you’ll lose that crumbly finish.
What the Oats, Yogurt, and Cookies Each Bring to the Jar
- Old-fashioned rolled oats — They keep a pleasantly chewy texture after soaking. Fresh oats from a sealed container are a good choice; there’s no need to buy a specialty brand for this recipe.
- Milk — Milk hydrates the oats and helps the mixture loosen into a spoonable breakfast. The kind you use changes the richness, so choose the milk you like drinking; a thinner option gives a lighter result.
- Plain Greek yogurt — Its thick body gives the oats a creamy texture, and its mild tang balances the sweet cookies. Plain yogurt keeps the cookie flavor clear; regular yogurt works in a pinch but makes the mixture less thick.
- Maple syrup — It sweetens the oats and brings a gentle caramel note that sits well beside chocolate cookies. Pure maple syrup has a more distinctive taste, while a less expensive pancake-style syrup will make the result sweeter and less maple-forward.
- Vanilla extract — A small amount rounds out the dairy and cookie flavors. Use the vanilla you already keep in your pantry; there’s no need to buy a premium bottle for a no-cook mixture.
- Oreo cookies — The chocolate wafers and sweet cream filling provide the defining cookie flavor. Crush them into small pieces so they’re easy to fold through the oats, and keep the final portion separate until serving for a more noticeable crumb topping.
Stir, Chill, and Finish These Oreo Overnight Oats
Mix the Oats and Creamy Base
Stir the old-fashioned oats, milk, Greek yogurt, maple syrup, and vanilla extract together in a lidded container that holds at least 12 ounces. Work around the bottom and sides so you don’t leave a pocket of dry oats or yogurt tucked against the container. The mixture will look loose before chilling; that’s expected. A steady stir is enough to bring it together.
Fold in Two Cookies and Let the Fridge Work
Fold in two of the crushed Oreo cookies, distributing the pieces through the mixture rather than leaving them in one clump. Cover the container and refrigerate for at least 6 hours or overnight. The oats need that time to absorb the milk and soften, so a short chill won’t give you the same creamy texture. Keep the remaining crushed cookie separate for the finish.
Stir Before the Cookie Topping
After chilling, stir the oats again from the bottom up. This evens out the thicker yogurt and any liquid that settled while the container rested. Spoon the remaining crushed Oreo over the top just before serving. The oats should be soft and creamy, with some chew left in the rolled oats.
Easy Ways to Change the Cookie and Oat Combination
Make It Dairy-Free
Replace the milk with unsweetened oat milk and the Greek yogurt with a thick, unsweetened dairy-free yogurt. Use dairy-free chocolate sandwich cookies if you need the whole bowl to be dairy-free. The oats will still soften, though the finished mixture may taste less tangy than the version made with Greek yogurt.
Make a Gluten-Free Version
Choose certified gluten-free rolled oats and gluten-free chocolate sandwich cookies in place of the standard oats and Oreos. Keep the same soaking method. The cookie flavor and crumb may differ a little by brand, but the creamy, chilled format stays the same.
Give the Jar a Mint-Chocolate Twist
Swap the Oreo cookies for mint chocolate sandwich cookies. Their mint filling changes the flavor without changing the cold-soak method, and the result tastes more like a mint-chocolate dessert. Choose cookies close in size to the originals so the topping and folded-in pieces stay in balance.
Make-Ahead and Serving
- Refrigerator: Keep the oats covered and eat within 3 days. The cookie pieces folded in will continue to soften as they sit.
- Freezer: Freezing isn’t recommended; thawed oats and yogurt can turn watery and lose their creamy texture.
- Serving: Serve cold. Stir the oats before eating, and add the reserved cookie topping at the last moment for its best texture.
Questions That Come Up With Oreo Overnight Oats
Oreo Overnight Oats
Ingredients
Equipment
Method
- Stir the oats, milk, Greek yogurt, maple syrup, and vanilla extract together in a lidded container that holds at least 12 ounces.
- Fold in 2 crushed Oreo cookies.
- Cover the container.
- Refrigerate for at least 6 hours or overnight.
- Stir the oats.
- Top with the remaining crushed Oreo cookie before serving.
