Amazing Emergency Microwave Chocolate Cake

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Ever needed cake in a hurry and just not had time on your side? You need this Amazing Emergency Microwave Chocolate Cake in your life! With just 3-4 mins in the microwave per layer, you’ll be filling your face with cake in no time I promise. Surprisingly light and delicious, this is a weapon you need in your baking (not so ‘baking’) armoury!

Here is what you will need to serve 10-12

(Recipe adapted from BBC Good Food)

For the Cake

  • 175g Golden Caster Sugar
  • 140g Plain Flour
  • 3 tbsp Cocoa Powder
  • 3 tsp Baking Powder
  • 100ml Boiling Water
  • 100ml Sunflower Oil
  • 2 Large Eggs
  • 1 tsp Vanilla Extract


For the Frosting

  • 300g Icing Sugar
  • 60g Cocoa Powder
  • 120g Unsalted Butter, Room Temp
  • 40ml Milk
  • Sprinkles, To Decorate (Optional)


Essential Equipment

  • 2 x 19cm (7.5″) Round Silicone Baking Pans
  • Microwave
  • Electric Stand Mixer or Large Bowl & Electric Hand Whisk


Emergency Microwave Chocolate Cake Recipe

First grease the 2 silicone baking pans with oil or butter and line the bases with baking paper. Set to one side.

Then tip the sugar into a large bowl and sift in the flour, cocoa powder and baking powder. Give it a good mix until everything is blended well.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Next, in a jug, beat together 100ml of boiling water, the oil, eggs and vanilla extract.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Then make a well in the centre of the dry ingredients and pour in the liquid. Using a rubber spatula, give it a good mix until it’s nice and smooth.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Next, divide the mixture evenly between the two prepared silicone pans. Gently tap to knock out any air bubbles.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Then place one into the microwave and cook on full power for 3 minutes. Test for doneness by poking a skewer or knife into the centre. If it comes out clean, it’s done. If there’s batter on it, pop back into the microwave in 20 second intervals until the skewer/knife comes out clean.

Immediately cover with cling film (to keep in the moisture) and allow to cool completely before decorating.

Repeat for the 2nd layer.

NOTE: My microwave is 800W. If yours is a higher power, reduce the cooking time. If it’s lower, increase it. Keep checking as above to see when it’s ready.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

To Make The Frosting

Either in an electric stand mixer or a large bowl with an electric hand whisk, beat together the icing sugar, cocoa powder and butter until sandy in texture.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Then pour in the milk and mix again for a couple of minutes until really smooth. Scrape down the sides of the bowl occasionally.

You may need a little more milk to achieve a nice spreadable consistency. Use your judgement but know this – you can always add more but you can’t take it out. Go easy.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

To Assemble

When your cakes are cooled, carefully remove one layer from the pan and place onto a cake stand or serving dish.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Take just under half the frosting and plop it onto the top of the cake. Then spread it out roughly with a spatula.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Next, carefully remove the other layer from it’s pan and place onto the top.

Then dump on the remaining frosting and smooth out as much or as little as you like over the top. Neat or rustic, this Microwave Chocolate Cake will still taste delicious!

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

You can leave it as it is or decorate however you please. I decided to add some sprinkles to the edge but you could top with chocolate curls, marshmallows, Summer berries or anything that takes your fancy really!

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake

Go on, take a good look at that. No one will ever believe this is a Microwave Chocolate Cake! I wasn’t convinced before I tried it for myself, but actually, when you see it rising, it’s a marvelously magical thing! Yielding a surprisingly delicious cake that is much lighter than you’d imagine, this is probably the greatest invention since sliced bread. Also a pretty dangerous one too I admit… my waistline is not thanking me for this but hey, who am I to question my cake magic destiny?!

Store any leftover cake in an airtight container or covered cake stand and consume within 3 days.

If yours has turned out a little dry for any reason, simply put in a covered cake stand/large sealed tub along with 1 or 2 slices of bread and leave for a few hours. The cake will absorb the moisture from the bread and leave the bread dry. Seriously, I’m not even joking. I’ve tried it myself and it genuinely works!

I hope you enjoyed the post my lovelies, until next time.

Miss KitchenMason

Liked this post? You’ll love my Chocolate Celebration Cake.

Emergency Microwave Chocolate Cake | Easy Cake Recipes | No Bake>


24 thoughts on “Amazing Emergency Microwave Chocolate Cake”

  1. Bonnie Beightol says:

    Hello! I can’t wait to try this. One question: what is golden caster sugar?

    1. Emma says:

      Hi Bonnie. Golden caster sugar is just like regular caster sugar (a superfine sugar) but with a slight caramel flavour to it. Emma x

  2. Chido says:

    I tried this and nailed it. Thanks so much

    1. Emma says:

      Hi Chido. I’m so happy this worked for you and that you enjoyed it! Thanks for sharing with me 🙂 Emma x

  3. R says:

    eggs are not cooked in boiling water?

    1. Emma says:

      Hi. No the eggs aren’t cooked in the boiling water as the other ingredients cool it down when they’re added 🙂 Emma x

  4. Esme says:

    Great recipe. I was comparing this to a similar BBC Good Food Guide one, where the cake is cooked in 1 cake tin. Does your recipe result in a higher rise if you split the batter in 2 and bake them separately? Thanks

    1. Emma says:

      Hi Esme. I wouldn’t say that it results in a higher rise, it’s more that I find it a lot of hassle slicing a cake in half neatly! I just think it’s easier to bake 2 instead, you’re guaranteed at least 2 nice flat surfaces then 🙂 Emma x

  5. Helen says:

    Thank you for your reply I will give it a try when We are out of lockdown and I can get the ingredients.

    1. Miss KitchenMason says:

      You’re very welcome Helen! I might even try this myself, it sounds yummy 🙂 Emma x

  6. Helen says:

    Can I use something else instead of cocoa powder .im not keen on chocolate cake. I like the sound of how easy it is to make .

    1. Miss KitchenMason says:

      Hi Helen. I haven’t tried it myself but I’m fairly sure you could just take out the cocoa powder in the sponge. As for the frosting I would do 150g butter, 300g icing sugar, 1 tsp vanilla and a splash of milk to loosen it up a little. You could also sandwich them with a little jam for extra flavour 🙂 Id love to know how you get on! Emma x

  7. Karishma says:

    What can I use instead of baking powder?

    1. Miss KitchenMason says:

      Hi Karishma! I found this article which seems super helpful. (I even learned a thing or two myself!) It has lots of great substitutes for baking powder. Emma x

  8. you did NOT list water in ingredients list.How much water.?

    1. Miss KitchenMason says:

      Hi Lynn. Apologies for any confusion. I state 100ml of water in the instructions but didn’t list it in the ingredients. Hope that helps! Emma x

  9. Gary & Sarah says:

    absolutely fantastic ! thanks very much for sharing.

    1. Miss KitchenMason says:

      Aww thank you very much for your lovely comment! Im so glad you like my recipe 🙂 Emma x

  10. Jana says:

    Thank you I made this for my mom’s birthday and it’s amazing

    1. Miss KitchenMason says:

      YAY! I’m so glad you like my recipe and it worked well for you! Thank you so much for sharing 🙂 Emma x

  11. Alice says:

    Sounds yummy, however, how do I convert “g” to cups & Centigrade to Fahrenheit, etc? I do not know metric.

    1. Miss KitchenMason says:

      Hi Alice. I usually type what I want to convert into google and the answer generally pops straight up. There are plenty of great conversion websites out there to help with this however, if you’d like to subscribe to my site you will receive a free conversion cheat sheet & a Best Bakes ebook 🙂 (You can sign up here:

  12. Bethany says:

    Love that this is called an “emergency” chocolate cake! Because sometimes it really is needed quickly!

    1. Miss KitchenMason says:

      The worst kind of emergency is the chocolate kind!!Haha, glad you like my post and thank you so much for commenting 🙂

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Hi, I’m Emma. Let me help you impress with delicious dishes using my easy recipes, step by step pics, tips & videos.