S’more mug cake is an easy 5-minute dessert for one with a sweet graham cracker cake, melted chocolate, and toasted marshmallows. It only takes a few minutes to make and cooks in one minute in the microwave.

photo of a S'more Mug Cake

I was desperate for a mug cake after work this evening. And I wanted to do something I hadn’t done before. So, I surveyed the ingredients in my kitchen and came up with the idea of a S’more mug cake.

The cake base is a fluffy graham cracker-flavored cake with melted molten chocolate in the center. I topped it with a toasted marshmallow. You can directly melt a marshmallow on top in the microwave and let it get all gooey over your cake, too, but I really wanted that toasted look, which reminds me of roasted S’mores in front of the fire.

close-up photo of S'more Mug Cake

Ingredients

  • All-purpose flour
  • Crushed graham crackers
  • Baking powder
  • Vegetable oil
  • Milk
  • Granulated sugar
  • Milk chocolate
  • Large marshmallow

Milk: I use fat-free milk, but you can use your favorite milk, including dairy-free milk.

Chocolate: Small chocolate squares work great because they melt really well. You can use milk chocolate, semi-sweet, or dark chocolate.

Marshmallows: As I mentioned, I like to toast a marshmallow, but you can melt it on top of the cake in the microwave.

S'more Mug Cake in a red mug

Recipe Notes

This was pretty tasty, though I would have liked some more graham cracker flavor. Next time, I might add a graham cracker crust at the bottom.

Also, I think I might need to top the surface with more marshmallows so that the melted marshmallows really mix with the cake. Maybe throw on a bunch of mini marshmallows.

I’ll fiddle with this some more, but this was a pretty tasty first try.

S'more Mug Cake

More Mug Cake Recipes

You can check out my entire mug cake recipe collection here.

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S'more Mug Cake

This cake is a fluffy graham cracker flavored cake, with melted molten chocolate in the center and with a toasted marshmallow.
Servings: 1
Prep Time: 4 minutes
Cook Time: 1 minute
Total Time: 5 minutes
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Ingredients

  • 4 tbsp all purpose flour
  • 2 tbsp finely crushed graham crackers
  • 1/4 tsp baking powder
  • 1 tbsp vegetable oil
  • 3 tbsp fat free milk
  • 2 tbsp granulated sugar
  • 2-3 small squares of milk chocolate
  • 1 large marshmallow
  • optional: 6-7 mini marshmallows

Instructions
 

  • Combine flour, graham cracker crumbs, baking powder, oil, milk and sugar in a large microwave safe mug. Mix with a small whisk until no flour chunks remain. Make a hole in the middle of the batter and stick in the chocolate squares. Cook in microwave for about 1 minute. Top of cake should look done and surface of cake should be dry rather than gooey.
  • Either add mini marshmallows or one large marshmallow and place on top of cake and heat for about 20 seconds until marshmallows are puffy. Or you can also take large marshmallow and toast in toaster oven for a few seconds until surface is light brown. I think the best result would be to use mini marshmallows and melt on cake in microwave and then add a toasted large marshmallow for garnish.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.
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