The lid comes off a chilled jar, and breakfast is already waiting—no pan, no timer, no morning cleanup. I like how the creamy oats have a little tang from the yogurt, while the chocolate and marshmallows make each spoonful feel like a small treat. These Smores Overnight Oats bring those familiar campfire flavors into a make-ahead breakfast without asking you to cook anything.
The base takes only a few minutes to stir together, then the refrigerator does the rest while you sleep. I make two portions in separate jars so they’re ready to grab, and keep the graham cracker finish in mind when it’s time to serve. The result is cool, creamy oats with chocolate, soft marshmallows, and that unmistakable graham flavor.
Kitchen Note
A wide-mouth 12-ounce jar is easier to work with than a narrow one here. It leaves room to stir the chilled oats and toppings without scraping your spoon against the sides.
Save these Smores Overnight Oats for a no-cook breakfast with creamy oats, chocolate chips, and marshmallows.
Why the Graham Cracker Goes on Last
Graham crackers bring the toasted, honeyed note that makes these taste like s’mores, but they behave differently from the oats. The oat mixture is meant to sit in the refrigerator for hours, giving its dry ingredients time to absorb moisture. Crushed crackers left in that mixture would soften along with it, losing the crumbly contrast that makes the topping distinct.
That’s why I treat the topping as a finish rather than another part of the overnight soak. The chocolate chips and mini marshmallows go onto the chilled oats first, and the graham crumbs crown everything just before serving. You get the familiar combination in one bite without turning the crackers into a damp layer. Crush the sheets into small pieces rather than powder, and they’ll still read as graham cracker instead of disappearing into the surface.
Old-Fashioned Oats, Greek Yogurt, and the S’mores Finish
- Old-fashioned rolled oats — They soften overnight but keep more chew than quick oats. Quick oats are a workable swap if you don’t mind a softer, more porridge-like texture; steel-cut oats stay too firm without cooking.
- Milk and plain Greek yogurt — Milk hydrates the oats, while Greek yogurt gives the base a creamy body and gentle tang. Use the milk you usually buy; there’s no need for a special brand. Regular yogurt can replace Greek yogurt, but the finished mixture will be looser.
- Chia seeds — These help the mixture thicken as it chills. I wouldn’t leave them out if you want the same spoonable texture; without them, the oats will be less set.
- Maple syrup and vanilla — Maple syrup sweetens the base, and vanilla rounds out its flavor. A standard bottle of vanilla works well here; the chocolate and marshmallow topping brings plenty of its own character.
- Mini chocolate chips and mini marshmallows — Their small size spreads the topping across the jars, so you get a little in each bite. The inexpensive baking-aisle versions are fine; no specialty chocolate is needed.
- Graham cracker sheets — Regular graham crackers provide the classic toasted flavor. Use a familiar grocery-store box and crush the sheets by hand; a few small pieces give the topping more texture than fine crumbs.
Mix, Chill, and Finish the Oats
Stir the Base Until Combined
In a medium bowl, stir together the old-fashioned oats, milk, Greek yogurt, chia seeds, maple syrup, vanilla, and salt. Keep stirring until the yogurt is blended in and you don’t see dry pockets of oats or concentrated clumps of chia. The mixture should look evenly combined, not layered. There’s no cooking step; the refrigerator softens the oats.
Divide and Let the Refrigerator Set the Texture
Divide the mixture between two 12-ounce jars or containers, then cover them. Refrigerate for at least 6 hours or overnight so the oats and chia have time to absorb the liquid. When they’re ready, the mixture should be creamy and spoonable rather than milky. If you open a jar before the chill time is up, the oats may still feel firm.
Add the S’mores Topping
Before serving, stir the chilled oats, then divide the mini chocolate chips and mini marshmallows between the containers. Finish each portion with crushed graham crackers. The toppings should be spread across the surface rather than piled into one spot, so each spoonful gets some of the s’mores combination. Serve straight from the jars or bowls.
Easy Ways to Change These Overnight Oats
Make the Base Dairy-Free
Use unsweetened plant-based milk and plain dairy-free yogurt in place of the milk and Greek yogurt. The chia still helps the oats thicken, though the result may be less tangy and a little less rich than the dairy version.
Dial Back the Sweetness
Use less maple syrup in the oat base and leave off some or all of the mini marshmallows. The chocolate chips and graham crackers still give the jars their s’mores feel, with a less candy-sweet finish.
Make It More Chocolate-Forward
Shift the topping balance toward mini chocolate chips and use fewer mini marshmallows. The chocolate comes through more strongly, while the oats stay just as creamy and the graham crackers still give you the classic s’mores note.
Storage and Serving
- Refrigerator: Keep the covered oat base refrigerated and use it within 3 to 4 days. It will continue to soften as it sits; the toppings are best added when you serve each portion.
- Freezer: I don’t recommend freezing these. The thawed oats can turn watery, and the yogurt may lose its smooth texture.
- Serving: These are meant to be eaten cold, so no reheating is needed. If you’ve already added the marshmallows and chocolate, stirring or heating can make the topping melt into the oats.
Questions That Come Up With Smores Overnight Oats
Smores Overnight Oats
Ingredients
Equipment
Method
- In a medium bowl, stir together the oats, milk, Greek yogurt, chia seeds, maple syrup, vanilla, and salt until combined.
- Divide the mixture between two 12-ounce jars or containers.
- Cover the containers and refrigerate for at least 6 hours or overnight.
- Before serving, stir the oats.
- Divide the chocolate chips and marshmallows between the containers.
- Top with the crushed graham crackers.
- Serve.
