This mug cake is the ultimate quick fix for any s’mores craving. You don’t need an oven or fancy equipment—just a mug, a few pantry ingredients, and a microwave. It’s perfect for a late-night treat, a fun dessert with kids, or anytime you want a taste of s’mores without the mess. Best of all, it’s ready in under 10 minutes with minimal cleanup.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
All-purpose flour
Unsweetened cocoa powder
Granulated sugar
Baking powder
Salt
Milk
Vegetable oil or melted butter
Vanilla extract
Graham cracker crumbs
Chocolate chips or chopped chocolate
Mini marshmallows
Directions
In a microwave-safe mug (10–12 oz), whisk together flour, cocoa powder, sugar, baking powder, and salt.
Stir in the milk, oil or melted butter, and vanilla extract until smooth.
Sprinkle a layer of graham cracker crumbs over the batter.
Add chocolate chips or chunks over the crumbs.
Top with a handful of mini marshmallows.
Microwave on high for 1 minute and 15 seconds to 1 minute and 30 seconds, or until the cake is set and the marshmallows are puffed and melty.
Let cool for 1–2 minutes before digging in. Enjoy straight from the mug.
Peanut Butter Twist: Add a spoonful of peanut butter in the center before microwaving.
Nutella Core: Drop a teaspoon of Nutella into the batter for a gooey surprise.
Crumb Topping: Mix a little butter into extra graham cracker crumbs and sprinkle on top for crunch.
Salted Caramel Drizzle: Drizzle caramel sauce over the top after microwaving.
Double Chocolate: Use chocolate milk instead of regular milk for a richer taste.
Storage/Reheating
This mug cake is best eaten fresh and warm right after cooking. If you must store it, cover and refrigerate for up to 1 day.
To reheat, microwave for 15–20 seconds, but note that the texture may become slightly denser.
FAQs
Can I make this without cocoa powder?
Yes, but it won’t have a chocolate cake base. You could substitute with extra flour and more chocolate chips for a blondie-style version.
Can I use almond milk or another milk alternative?
Yes, any milk (dairy or non-dairy) will work in this recipe.
What size mug should I use?
A microwave-safe mug that holds at least 10–12 ounces is ideal to prevent overflow.
Why did my mug cake overflow?
Your mug may be too small, or the batter too high. Fill the mug only halfway with batter before adding toppings.
Can I make this gluten-free?
Yes, use a gluten-free all-purpose flour blend and gluten-free graham crackers.
Can I add an egg?
This recipe is designed to be egg-free for texture and ease. Adding an egg may make the cake rubbery due to the small serving size.
Can I bake this in the oven?
Mug cakes are designed for the microwave, but you could try baking at 350°F for 10–12 minutes in an oven-safe ramekin.
Do I need to spray the mug?
It’s optional. A quick spray with nonstick cooking spray can help with cleanup, but it’s not required.
Can I use marshmallow fluff instead of mini marshmallows?
Yes, swirl a spoonful into the batter or dollop on top before microwaving.
How can I make it richer?
Use melted butter instead of oil, and add extra chocolate chips for more decadence.
Conclusion
S’mores Mug Cake is a fast, fun, and flavorful way to enjoy the classic campfire treat with no mess and no fire required. With its gooey marshmallows, melted chocolate, and soft cake base, it’s the perfect cozy dessert for any night of the week. Whether you’re satisfying a late-night sweet tooth or looking for an easy way to wow kids or guests, this one-mug wonder never disappoints.
S’mores Mug Cake is a warm, gooey, single-serve dessert that transforms classic campfire flavors—graham crackers, chocolate, and marshmallows—into a quick and easy microwave treat. Perfect for when you’re craving something sweet in minutes.
Ingredients
1/4 cup all-purpose flour
2 tablespoons unsweetened cocoa powder
2 tablespoons granulated sugar
1/4 teaspoon baking powder
Pinch of salt
1/4 cup milk (dairy or non-dairy)
2 tablespoons vegetable oil or melted butter
1/4 teaspoon vanilla extract
2 tablespoons graham cracker crumbs
2 tablespoons chocolate chips or chopped chocolate
2–3 tablespoons mini marshmallows
Instructions
In a 10–12 oz microwave-safe mug, whisk together flour, cocoa powder, sugar, baking powder, and salt.
Add milk, oil or butter, and vanilla extract. Stir until smooth and combined.
Sprinkle graham cracker crumbs evenly over the top of the batter.
Add chocolate chips on top of the crumbs.
Top with mini marshmallows.
Microwave on high for 1 minute and 15 seconds to 1 minute and 30 seconds, until the cake is set and marshmallows are puffed.
Let cool for 1–2 minutes and enjoy warm straight from the mug.
Notes
Use a large (10–12 oz) mug to avoid overflow.Add peanut butter or Nutella to the center for a gooey twist.For extra richness, use chocolate milk instead of regular milk.Swirl in marshmallow fluff if mini marshmallows are unavailable.Top with a drizzle of caramel sauce or a graham crumb streusel for added flair.
