Pumpkin Marshmallow Mug Cake

This delicious Pumpkin Marshmallow Mug Cake will satisfy your pumpkin craving in less than 3 minutes!

Pumpkin Marshmallow Mug Cake | Cupcake and Bacon

There’s a little boy I know named Patrick who I affectionately call Crazypants. It originally started as a joke. He was in my Sunday school class, and he just won’t stop moving. So I planned for him. Apart from their Bible story, everything we did involved them moving around in some way. And he still wouldn’t stop moving.

Pumpkin Marshmallow Mug Cake | Cupcake and Bacon

So I decided to call him Crazypants whenever he was being, well, crazy. It was a self-monitoring thing. You know, all that stuff they teach you in school that is supposed to work to modify children’s behavior.

Pumpkin Marshmallow Mug Cake | Cupcake and Bacon

He wore it like a badge. I don’t know if he ever realized why I called him that, but the other kids thought it was hilarious. And he was quite proud of his new nickname.

Pumpkin Marshmallow Mug Cake | Cupcake and Bacon

Well call me Crazypants because that’s how I feel right about now. I have a five day weekend for teacher conventions and Veteran’s Day, and I haven’t stopped running around since school ended at 1:38 yesterday. I need some of this cake. Also, check out Bacon’s skillful hand modeling. He was getting frustrated that I a.promised him cake and made him wait until the pictures were done to eat it and b. took about a million pictures of him holding the spoon. His poor arm.

Pumpkin Marshmallow Mug Cake | Cupcake and Bacon

In the time he waited for his poor cake, I probably could have made about 4 more. The recipe is a little different than regular mug cakes. It’s put together more like a traditional cake, then poured into a mug. or two. or four. Just double or quadruple the recipe as necessary.

Pumpkin Marshmallow Mug Cake

Rating: 51

Prep Time: 10 minutes

Cook Time: 2 minutes

Total Time: 12 minutes

Yield: 1 cake

Serving Size: 1 cake

Pumpkin Marshmallow Mug Cake


  • 4 tbsp butter, melted
  • 1/4 c. pure pumpkin puree
  • 1/2 tsp. vanilla
  • 1/4 c. brown sugar
  • 1 egg
  • 1/4 c. flour
  • 1/2 tsp. baking powder
  • 1/8 tsp.salt
  • 1/2 tsp. pumpkin pie spice
  • 1 heaping tbsp. marshmallow fluff (plus extra for topping)
  • 1/8 tsp cinnamon (for garnish)


  1. Allow melted butter to cool slightly. Stir in pumpkin and vanilla. Set aside.
  2. In a 4 qt. measuring cup, whisk together sugar and eggs.
  3. Add pumpkin mixture and whisk until smooth.
  4. Sift in flour, baking powder, and salt, whisking until combined.
  5. Pour into mug.
  6. Microwave on 50% power for 45 seconds. Take out mug and stir to ensure even cooking.
  7. Microwave on 50% power for an additional 45 seconds. Stir cake once more.
  8. Use a spoon to push aside some of the cake in the middle and put marshmallow fluff in the hole.
  9. Microwave on 50% for an additional 35-45 seconds or until cake is fully cooked. It should feel firm to the touch.
  10. Top with marshmallow fluff and a garnish of cinnamon.
  11. Enjoy!
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And if you are running around as much as I am, just do what Patrick does. Smile at everyone you meet and say “She calls me Crazypants.”



  1. This looks SO good. And completely new!
    Katelyn recently posted…Two Year Car Accident Anniversary: Blessings in DisguiseMy Profile

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