My baking experiment #40 – marshmallow stuffed peanut butter cookies

Yesterday (June 12) was national peanut butter cookie day. After browsing several recipes for pb cookies, I decided on this one for marshmallow-stuffed cookies:


  • 1/4 cup butter, melted
  • 3/4 cup peanut butter
  • 3/4 cup packed brown sugar
  • 1 egg
  • 1 teaspoon vanilla
  • 1 tablespoon milk
  • 1/4 teaspoon salt
  • 1 teaspoon baking soda
  • 1.5 cups flour
  • mini marshmallows


  1. Whisk together flour, baking soda & salt. In another bowl, whisk butter, peanut butter, sugar, egg, vanilla, and milk together until combined. Slowly add in flour mixture and mix until dough just comes together.
  2. Chill dough for at least an hour. Preheat oven to 350 degrees. Line a cookie sheet with parchment.
  3. Using a cookie scoop, scoop chilled dough and place on prepared cookie sheet. Flatten dough slightly with the palm of your hand. Place mini marshmallows on top of the dough. Top with another scoop of dough and gently squish together until it forms one cookie. Bake 12-15 minutes until bottoms start to brown. Cool about 5 minutes and then remove from cookie sheet to cool on wire rack. Enjoy while they’re warm!

Well… these cookies were definitely nutty! The smell of peanut butter wafting out of the oven was delicious. However, the marshmallows melted into the cookies and disappeared, so i’m left with peanut butter cookies with giant holes in them. Hmm… wonder what i did wrong there.

Despite their appearance, the cookies tasted great! Every bite was full of peanut flavor, and if you’re a peanut butter lover like me you’ll really enjoy them. Maybe i should’ve just skipped the marshmallows and made regular peanut butter cookies. Next time i’ll try this recipe without the marshmallows 🙂

wet & dry
wet & dry
before baking
before baking
after baking
after baking
peanut butter cookies
peanut butter cookies

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