Baking and desserts

5-Minute Chocolate Mug Cake

5 min, 3 active1 servings443 kcal per servingEasy

Sometimes you want something sweet right now, just one portion and hardly any washing up. A mug cake takes five minutes. This one has no egg, and that is deliberate: a whole egg in such a small cake makes it rubbery and eggy. Without it the cake comes out soft and moist, like a real chocolate sponge, and a few pieces of chocolate melt inside for a gooey middle. The one thing to watch is time. An extra 20 seconds in the microwave is the difference between tender and dry.

Method

Tap a step to mark it done.

  1. Use a 300-350 ml microwave-safe mug. The cake nearly doubles in height.

  2. Add the flour, sugar, cocoa, baking powder and a pinch of salt and mix with a fork, breaking up any cocoa lumps.

  3. Pour in the milk and oil and stir until smooth, scraping the bottom and edges.

  4. Push the chocolate pieces into the batter.

  5. Microwave on 800 W for 60-70 seconds, or 50-55 seconds on 1000 W.

  6. It is ready when the top looks dry and springy; a small damp spot in the centre is fine and will set as it rests.

  7. Leave for 1-2 minutes, as the mug is very hot, then eat straight from it.

Tips for success

  • Rubbery cake means overcooking. Start with the shortest time and add 10 seconds at a time.
  • Too big a mug gives a flat, dry cake; too small and it overflows.
  • Mix the cocoa in well, lumps taste bitter.
  • It sinks a little as it cools. That is normal, do not put it back in.

Serving and storage

Eat warm from the mug with a scoop of ice cream, whipped cream, a spoon of sour cream or a few berries.

Made to be eaten straight away. Once cool it is denser; reheat for 10 seconds.

Variations

  • Vanilla: leave out the cocoa, add 10 g more flour and vanilla sugar.
  • Peanut butter: drop a teaspoon of peanut butter into the centre.
  • Mocha: replace half the milk with strong cooled coffee.

Calories and macros

Per serving (about 137 g):

443kcal
7.2protein, g
21fat, g
57.6carbs, g

Per 100 g: 323 kcal, P 5.2, F 15.3, C 42.1. An estimate based on average ingredient values. Your daily calories ›

VegetarianQuickNo ovenFor kids

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Frequently asked questions

Why is my mug cake rubbery?

Usually overcooking, or an egg in the batter. A whole egg is too much for one small cake. Cook for the minimum time; a slightly moist centre firms up as it rests.

Can I add an egg?

You can, but double everything else and use a bigger mug. For a single portion, just a yolk adds richness without the rubbery texture.

How long do you microwave a mug cake?

About 60-70 seconds at 800 W, 50-55 seconds at 1000 W and about 80 seconds at 700 W. Microwaves vary, so check early the first time.