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Spoon holding scoop of cake above a mug with cake and bananas inside

Honey Peanut Butter Banana Mug Cake

  • Author: Kate
  • Prep Time: 5 minutes
  • Cook Time: 90 seconds
  • Total Time: 6 minutes 30 seconds
  • Yield: 1 mug cake 1x
  • Category: dessert
  • Method: microwave
  • Cuisine: American


A deliciously moist honey banana mug cake surrounds a warm, slightly salty honey peanut butter center.


  • 5 tbsp. flour
  • 1/2 tsp. baking powder
  • 2 pinches salt, divided
  • 1 tbsp. vegetable oil
  • 3 tbsp. milk
  • ¼ tsp. vanilla
  • 2 tbsp. honey, divided
  • ¼ c. chopped banana (about ½ small banana)
  • 2 tbsp. peanut butter
  • extra honey and chopped banana for topping (optional)


  1. Mix flour, baking powder, and pinch of salt in large, microwave safe mug (see note). Mix in oil, milk, 1 tbsp. honey and vanilla until smooth. Add in chopped banana, stir gently to combine.
  2. Mix together 1 tbsp. honey, 2 tbsp. peanut butter and generous pinch of salt in a separate bowl.
  3. Scoop honey peanut butter mixture out of the bowl and place in the middle of the cake batter. Press down on the peanut butter with the back of a spoon so the peanut butter sinks down into the batter (peanut butter doesn’t need to be completely covered).
  4. Microwave on high for 90 seconds, or until the top of the cake is firm (after the first 90 seconds, microwave in 15 second increments until cake is cooked).
  5. If unmolding cake, run a knife around the edges of the cake before inverting onto a plate. Serve with additional chopped banana and honey drizzled on top (optional).


If you want to unmold the mug cake onto a plate rather than eating directly out of the mug, mix the batter in a separate bowl rather than in the mug itself. Grease the mug before adding batter to the mug.

Keywords: honey banana mug cake, honey peanut butter mug cake, peanut butter banana mug cake