Microwave peanut butter & jam brownies

Forget microwave mug cakes – if you're after some serious indulgence in just 15 minutes, this easy chocolate brownie recipe is sure to hit the spot

  • Prep:10 mins
    Cook:5 mins
  • Serves 6
  • Easy

Nutrition per serving

  • kcal 290
  • fat 16g
  • saturates 8g
  • carbs 20g
  • sugars 23g
  • fibre 1g
  • protein 5g
  • salt 0.4g


  • 75g butter, plus a little extra for greasing
  • 50g peanut butter
  • 1 egg
  • 25g cocoa powder
  • 50g plain flour
  • 100g sugar
  • few tsp of jam


Vary the recipe

I love using crunchy peanut butter in this recipe but smooth works just as well.

Watch the video!

Watch Jack Monroe making her microwave peanut butter & jam brownie.


  1. Add the butter and peanut butter to a microwave-safe bowl and cook on High for 30 secs to melt. Remove from the microwave and stir thoroughly. Allow to cool slightly then add the egg and stir to combine. Grease with butter and line a second microwaveable round dish (about 15cm wide) with cling film. Tip the peanut butter mix into the lined dish then sieve in the cocoa powder and flour and tip in the sugar. Mix gently to form a thick, sticky paste. Smooth the top of the mixture with the back of a large spoon.

  2. Using a teaspoon, make crater-holes in the top of the brownie mixture and fill each generously with jam as it will melt and bubble down when cooked. Pop in the microwave for 3-4 mins on High. Remove and leave to cool for 15 mins (it will carry on cooking as it cools) then enjoy!

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