Molten Mug Chocolate Cake
Member recipe

Molten Mug Chocolate Cake

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(33 ratings)

Member recipe by


Serves 2

This decadent chocolate cake recipe is perfect for a late night treat. Add a dollop of peanut butter in the middle for an added bonus!

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  • Ingredients
  • 1 coffee mug
  • 4 Tbsp. cake flour (plain, not self-rising)
  • 4 Tbsp. sugar
  • 2 Tbsp. cocoa
  • 1 egg
  • 3 Tbsp. milk
  • 3 Tbsp. oil
  • Small splash of vanilla
  • 3 Tbsp. chocolate chips, optional
  • 1 teaspoon peanut butter, optional


    1. Add dry ingredients to mug, mix well with a fork.
    2. Add egg, mix throughly.
    3. Pour in milk, oil and vanilla, mix well.
    4. Add chocolate chips if desired. Push a dollop of peanut butter into the center of the batter if desired.
    5. Put mug into microwave and cook for three minutes on 1000 watts. Cake will rise over top of mug. Allow to cool for 2 minutes.

Comments, questions and tips

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2nd Apr, 2015
I had high hopes for this. It tasted like burnt flour. I followed the instructions exactly. I even checked the wattage of the microwave and adjusted the power level to 7, since the wattage was 1480 W. It was also rubbery and very dense. No molten centre. I would love to find another recipe for this type of cake so if you can direct me to another recipe that works, or adjust this recipe so that it is not gross, i would appreciate it.
29th Mar, 2015
Was looking for an easy chocolate cake recipe and thought that this would be perfect, that was until I had actually made the cake. I followed the recipe exactly (without using chocolate chips or peanut butter). There was far too much egg as in the first minute or so in the microwave, the mixture was spilling over the top of the mug. I waited for the full three minutes and when I turned the cake out onto a plate after about a minute or two of cooling, I was face with a dense, rubbery chocolate mess. I did not read the comments before deciding to make this cake, but I will definitely read them before I try another recipe.
15th Feb, 2015
Made this yesterday and will not be making it again unless I have an urgent need to create rubber! Maybe one of the recipes suggested by other users is worth a try - but I wouldn't waste the ingredients following the main recipe - a lot of people seem to say there was too much egg - I used medium eggs, maybe small would work better.
13th Jan, 2015
Just made this, its a nice tasting mixture but 3 minutes cooking time totally nuked it and it was horrible! I then tried with 2 minutes and it still was over cooked but moist, next time I will try for 1 minute and hope it has the molton centre. I do wish I hadn't found it as now I have chocolate cake in under 5 mins, not good for the diet :( It did need to be eaten straight away as it did become harder the longer it was out of the microwave.
12th Nov, 2014
Well it worked well for me with couple of tweaks inspired by the comments and addition of coffee to give a mocha edge! But I was determined to mix-make-bake it ALL in the one mug as that's the point, so no separate bowls for me... I used self raising flour (think it def needs to be SR or plain with baking powder) but as I have coeliac's, it was gluten free... Plus 3 tbsp caster sugar, 2 tbsp cocoa powder - mixed really well in mug. Added one egg, and again mixed v thoroughly until a paste. Added 3 tbsp sunflower oil and then 1 tsp instant coffee dissolved in 3 tbsp semi skimmed milk. Another good mix. No extras and cooked 2.5 mins in 800w machine on full power... Yum scrum! PS. I made it in a humongous 500ml Cath Kidston mug (not sure the brand made much difference but it did look pretty ;)
28th Sep, 2014
3 minutes is WAY too long. It came out horrible and rubbery, put me off trying to make it again!
16th Jun, 2014
After looking at the comments I've come up with the perfect recipe that produces a light, moist chocolate sponge cake (although not molten) Recipe: 4tbsp self raising flour 2tbsp soft light brown sugar 2tbsp caster sugar 2tbsp cocoa powder Approx 2tbsp of melted unsalted butter (I say approx as I just cut off about a 1/2 cm slice off of a block) Splash on vanilla extract 4tbsp milk 1 egg Method: Mix the dry and wet ingredients separately then mix together (I would do this in a cereal bowl) I then poured half the mixture into a mug and added a few chocolate chips and put in the microwave for 1 min on 900w The only issue I found was the chocolate chips sunk to the bottom however this could be rectified by coating the chocolate chips in flour before adding And done, the only thing I would do next time is add a scoop of ice cream once done but I didn't have any at the time! Hope this works for everyone
8th Apr, 2014
I just made this and it tasted great. Did exactly as the recipe said. Only used the one mug and cooked it for the 3 minutes. Turned out beautiful, raised nicely and was light and fluffy. Didnt add the peanut butter but did use the choc chips. Won't hesitate to use it again
25th Feb, 2014
I made it without chocolate chips but only cooked for 1min 30secs in our microwave (800w) so there was a bit of goo still in the mug (yummy). Cooking for the full 3 mins made a very dense cake, hot and quite tasty though, but I found it dry. Hence trying again but not cooking for so long!
21st Feb, 2014
I made this last night and, I'm not going to lie, I ate the whole lot! Although I did make it in a bowl (there is no way this mixture would fit in a mug!) and with self raising flour instead of plain. 3 mins would be too long in my 800w but 2 mins was ok. Today I made this as an after school snack and split the mixture between two mugs and cooked for 1 min each. It's not a "molten" cake, but for a quick chocolate cake fix it's great (especially when you put orange flavoured chocolate spread in the middle!).


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