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Quick S’mores Mug Cake

Okay, imagine this: it’s just past dinnertime, you want something sweet, chocolatey, and nostalgic, but no one feels like breaking out a whole baking project. That’s exactly where this Quick S’mores Mug Cake comes in — and honestly, it might just become your go-to dessert shortcut. It’s like a little campfire in a cup, bubbling up in just minutes with marshmallow goo and melty chocolate hugging a tender cake base. Plus, it’s super fun to make and perfect for when you want that cozy comfort without the fuss. Trust me, once you mix the batter, pop it in the microwave, and inhale that warm, toasty aroma, you’ll see why this recipe is a tiny kitchen celebration every single time.

Quick Facts

Yield: Serves 1
Prep Time: 5 minutes
Cook Time: 1–2 minutes
Total Time: 7 minutes

Ingredients

For the Main Dish:

4 tbsp all-purpose flour
2 tbsp granulated sugar
1/4 tsp baking powder
2 tbsp milk
1 tbsp melted butter (plus extra for greasing)
1/4 tsp vanilla extract
4 small marshmallows
2 tbsp chocolate chips
Graham cracker crumbs (about 1 tbsp)

How I Make It

Step 1:

Grab a microwave-safe mug and give it a light buttering to keep the cake from sticking. In a small bowl or right in the mug, whisk together the flour, sugar, and baking powder so it’s nice and even—no lumps here!

Step 2:

Add in the milk, melted butter, and vanilla extract, then stir until you have a smooth, slightly thick batter. Don’t worry if it’s a bit lumpy from the butter; that’s okay!

Step 3:

Sprinkle in the chocolate chips and fold them gently into the batter, then drop the marshmallows right on top, evenly spaced so they’ll melt into gooey pockets.

Step 4:

Finish by sprinkling a tablespoon of graham cracker crumbs on top — this adds that signature s’mores crunch and a bit of nostalgic flavor.

Step 5:

Pop the mug into the microwave and cook on high for about 1 to 1 1/2 minutes. Keep an eye on it — once the cake has risen and looks set (but still soft), it’s done.

Step 6:

Let it cool for a minute or two — the marshmallow will be bubbling hot. Grab a spoon and dig in while it’s warm, gooey, and perfectly chocolatey.

Variations & Tips

Swap out regular milk for almond or oat for a dairy-free option.
Add a pinch of cinnamon or a dash of espresso powder to the batter for a flavor kick.
Try peanut butter chips instead of chocolate chips for a nutty twist.
If your microwave tends to cook unevenly, stop halfway and rotate the mug.
For a crunchier top, toast the graham cracker crumbs under a broiler for 1 minute before adding.
Use mini marshmallows if you want more even melting.

How I Like to Serve It

This mug cake is perfect right out of the microwave with a small scoop of vanilla ice cream melting over the top for extra decadence. It’s a quick fix that’s ideal for late-night cravings or rainy-day treats when staying cozy is the plan. Bonus points if you enjoy it while snuggled up with a favorite book or movie!

Notes

Store any leftovers covered in the fridge for up to 2 days—best reheated in short bursts in the microwave.
If you want a less sweet treat, reduce sugar by 1 tbsp, but keep in mind the chocolate and marshmallows carry a lot of sweetness.

Closing: This Quick S’mores Mug Cake never fails to hit that warm, cozy sweet spot, making every bite feel like a mini celebration of comfort and joy.

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