Peanut Butter Mug Cake

October 30, 2014

For some time I have been fascinated by mug cakes. These are cakes that you cook in a mug in the microwave and are ready in no time. You can literally whisk up the ingredients and in less than five minutes be eating cake. There is something mystical about spooning sugar and flour into a mug, popping it into the microwave and watching a perfectly risen cake appearing. It is perfect for an indulgent mid afternoon snack on an October day when the wind is howling around the windows and it is too cold to go out.

I decided it was time to try and create one of these mug cakes myself. I chose to attempt a peanut butter mug cake as I currently seem to have a cupboard full of different types of peanut butter. I decided I would use this new Three Nut Butter from Whole Earth. Three Nut Butter is made from three different types of nuts, cashews, hazelnuts and peanuts and I thought it would add a more exotic taste to my cake. It also has no added sugar as well as being a great source of fibre, so my cake would be reasonably healthy.

Peanut butter mug cakeIt really did work like magic, I mixed up all the ingredients, poured it into the mug put it into the microwave and watched as it fluffed up into a cake. It was amazing the way the mixture just suddenly puffed up over the edges making a perfectly formed cake in a mug. The cooking time depends on the power of your microwave. I checked mine after a minute and a half and found it needed a little bit longer. It only took two minutes in total to cook and it was bliss to eat a steaming warm cake.

Peanut butter mug cakeThe cake tasted delicious, the three nut butter worked really well giving it a lovely nutty taste. It was a very filling cake, I could not eat it all in one go.  I think next time I would use a smaller mug and make two cakes. I did however tip half of the cake out of the mug and keep it for later. It tasted just as nice eaten cold.

Peanut butter mug cakeNow I have found out how simple it is to make a mug cake I will definitely be trying this again. Maybe next time I will get more adventurous and make some kind of creamy topping to put on the cake. My son loved it as well, I think the magical way a cake appeared in the mug was really appealing to him. If you want to use Three Nut Butter you can find it in Sainsbury’s and Tesco RRP £3.19.

Peanut Butter Mug Cake



  • 4 tablespoons all purpose flour
  • 4 tablespoons white granulated sugar
  • ¼ tsp baking powder
  • 1 egg
  • 3 tablespoons peanut butter
  • 3 tablespoons milk
  • 3 tablespoons vegetable oil


  • Mix all the ingredients together in a bowl.
  • Whisk until smooth
  • Pour into a large mug or two smaller mugs
  • Place in the microwave and cook on high for 1½ minutes
  • Check if it is cooked, if it needs longer just cook for 30 seconds more then repeat until done.

I was sent the Three Nut Butter in return for an honest review.

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13 responses to “Peanut Butter Mug Cake”

  1. Eileen Teo says:

    I love mug cake too! They taste like chinese steamed cake! Very light and soft. Your cake look fab!

  2. Oh I love a mug cake and peanut butter if the best thing in the whole world (obviously) so this sounds awesome. Thanks for sharing..

  3. House in Tillford says:

    yumm so good yet so bad how easy it is now to whip up a cake for one!

  4. Ooh fab idea – I was always dubious about how well a cake made in a microwave could work but you’ve convinced me. Perfect for putting a smile on the kids’ faces after a cold, rainy school run ! 🙂

  5. We eat almond and cashew butters, would make a good little cake too.

  6. Honest mum says:

    Love these quick steamed puddings in a cup and my husband is obsessed with peanut butter (I can’t eat nuts sadly)! Thanks for linking up to #tastytuesdays

  7. I love mug cakes and peanut butter, so I should definitely try your recipe, thank you for sharing! 🙂 x

  8. I keep thinking I should make a mug cake.

  9. Stacey Guilliatt (Nobody Said It Was Easy) says:

    I’ve not made a mug cake yet, but i do love peanut butter. Looks great #tastytuesdays

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