Chocolate Fudge S’mores Mug Cake is the epitome of awesome this summer! This S’mores is made in a mug in the microwave in 5 minutes flat! A layer of graham cracker crumbs (digestive biscuits), smothered in a gooey moist chocolate cake, then topped off with ooey gooey roasted marshmallow fluff.
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Hi all! How are you? I hope you’re all having an awesome July so far, and are still rocking out this summer. I know I am, I don’t want summer to end… ever! 😆
I like to extend as much summer as I can, for as long as I can. And since the weather will soon start to change – heck, in England I’d be lucky for at least some ‘warmness’ when August rolls around, ha! So I wanted to make another super-de-dooperly quick and easy dessert for you guys to enjoy.
I decided on a Chocolate Fudge S’mores. And it comes in a mug. You’ll feel special! 🙂
Let’s talk about this Chocolate Fudge S’mores Mug Cake, shall we? I wouldn’t actually call it a mug cake at all, I’d say it’s more a combination of a super moist cake / pudding.
You know what’s crazy? I had never even tried S’mores until now! I know, I know… it’s more of a US thing and being a Brit, s’mores isn’t really that heard of here unfortunately.
So it’s funny how I rectify my s’mores experience by completely skipping the regular s’mores and diving in headfirst by creating a s’mores mug cake instead.
#thatshowiroll
To make this chocolate fudge s’mores, you start with graham cracker crumbs (aka. digestive biscuits in the UK), push those crumbs into the bottom of a mug. Then making a gooerrific chocolate batter and smothering on top of the graham crackers. Finally topping with marshmallow fluff and cooking in the microwave.
Voila! …one amazing s’mores! You can even go as far as roasting the marshmallows under the grill or by using a kitchen torch, like I did.
This s’mores recipe also utilises on store-cupboard staples and it ridiculously easy to make. No need to light that campfire though!
And no need to preheat that oven in summer! My kids love this S’mores Mug Cake, and have been eating them all summer!

Chocolate Fudge S'mores in a Mug!
Prep Time: 5 minutes
Cook Time: 1 minute
Yield: 2 mug cakes
A layer of graham cracker crumbs (digestive biscuits), smothered in a gooey moist pudding-like chocolate cake, then topped off with ooey gooey roasted marshmallow fluff!
Ingredients:
- 4 tbsp butter
- 4 tbsp unsweetened cocoa powder
- 1 large egg
- 4 tbsp milk
- 6 tbsp granulated sugar
- 6 tbsp self-rising flour
- 60g (2.1 oz) graham cracker (digestive biscuit) crumbs
- 4 tbsp marshmallow fluff
Directions:
- Add the graham crackers (or digestive biscuits) to a food processor and pulse until crumbs form. Set aside.
- Add the butter to a small bowl and heat in the microwave for 20-30 seconds, or until melted.
- Sift in the cocoa powder until combined, then add the egg and milk and beat with the fork until combined.
- Next, add the sugar, flour and salt and beat again until smooth.
- Divide the crushed crackers or biscuits into two 350ml (approx. 1½ cup) sized mugs and press down. Divide and spoon the batter over the top, then carefully top with the marshmallow fluff.
- Cook in the microwave for 1 minute 30 seconds (1000W) or up to 1 minute 45 seconds (800W or under).
- Once cooked, use a kitchen torch to roast the marshmallow fluff or alternatively, place under the grill to roast - optional.
- Serve immediately.

Love Mug Cakes and Mug Cookies? You’ll love these:
- Honey Mug Cake
- Chocolate Brownie [in a mug]
- Piña Colada Mug Cake
- Chocolate Salted Caramel Mug Cake
- Key Lime Cheesecakes (‘baked’ in the microwave)
- Chocolate Peanut Butter Mug Cake
- Lemon Curd Cheesecakes (‘baked’ in the microwave)
What’s your favourite summertime treat?
More S’mores desserts from blogs I love:
S’mores Bars by Brown Eyed Baker
S’mores Baked Alaska by Liv for Cake
S’mores Cake by My Baking Addiction
*gasp*
this recipe is VERY VERY dangerous! Waaay too easy to make something SO irresistible!
This is the perfect s’mores. No campfire needed. Thanks for sharing. I will definitely try this out this week.