Peanut Butter Brownie in a Mug

I love single serving desserts! When I want something sweet at night and don’t want to turn on the oven this peanut butter brownie in a mug recipe is just perfect! It is quite simple and perfect for a late night treat and you can really fool around with it and add other goodies too if you want. We love the added peanut butter but if you have an allergy in your house you can omit it and it is still delicious!

I like this brownie in a mug recipe because it is easy and I had everything in my cupboard at home. I changed a few things and added peanut butter and it came out amazing! I’m all about easy and ooey gooey desserts so I’ve made this one often because it’s just so easy and hits the spot when I want something sweet.

You don’t have to add peanut butter, you can leave it an ooey gooey brownie in a mug, but we’re all about peanut butter here so the added addition was delicious! All you need are a few ingredients and a medium/large mug and it is the perfect late night or after school treat. Here’s how to make a brownie in a mug.


  • 1/4 c . sugar
  • 1/4 c . flour
  • pinch of salt
  • 2 tbsp . cocoa I used dark chocolate Hershey’s
  • 2 tbsp . oil
  • 1/4 c . water
  • 1 tbsp . peanut butter
  • 1/4 tsp . vanilla


Add dry ingredients to mug and stir (use 12 oz. mug or larger because it will rise a bit). Add wet ingredients to mug and stir until mixed. Put tbsp. of peanut butter in middle of mix and push down a bit so it is submerged in batter. Microwave for 60 seconds…done!!

If you love this easy brownie in a mug recipe you could put together the dry ingredients in small baggies to use on other nights and write with a sharpie on the bag what wet ingredients you need so it’s quick!!