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Peanut Butter Blossoms are probably my favorite cookie – and not just at the holidays. But you know what makes blossom cookies even better?

Adding a mini Reese’s Peanut Butter Cup. Know what makes them infinitely better? Add a mini marshmallow.

Peanut Butter Blossoms + Peanut Butter Cup + Marshmallow = S’more Blossoms…My favorite new way to eat a s’more!

Peanut Butter S'more Blossoms sitting on a white plate with marshmallows spread around and text on top

Jordan won’t stop losing teeth. I mean, I know they’re just baby teeth. I know it’s supposed to happen. But I swear, it’s like a cartoon in here: one falls out and three more follow.

It feels like she’s been losing teeth forever…probably because she has. She’s been losing teeth for half her life, thanks to the tile floor in our old kitchen when she was 4.

She had 4 baby ones pulled for braces and all the permanent ones under the surface are all piled up and rushing to the front of the line, so the rest of her baby teeth just keep falling out. Three more since January (we’re up to #15, I think, I’ve lost count) and two of those were at the orthodontist, only held in by the brackets and wires.

Did you know that teeth with brackets on them are worth more? Our tooth fairy pays well for metal.

If you hate teeth, I’m sorry for this post. I hate them too. But something about mini marshmallows makes me think of teeth, and when I think of teeth I think of Jordan, only I think about her drawn as a cartoon where one tooth falls out and the rest follow.

I’d be shuddering right now, but I’m going to instead think of these Peanut Butter Blossom S’mores. Cookies are better than teeth.

Especially with peanut butter cups!

Peanut Butter S'more Blossoms collage

Blossom cookies are my #1 favorite, especially at the holidays. But why do they get made only at Christmas? They’re a peanut butter cookie – they should be made all year long.

So, new solution: make them in summer but make them s’mores. That fits, right?

These cookies are based on my favorite peanut butter cookie recipe. I made them super small (1 tablespoon each), rolled them in sugar, and baked them. While they’re hot from the oven, I poke a little hole with the back of a wooden spoon. Press a mini marshmallow into the hole, then top it with a Reese’s Peanut Butter Cup Mini. I used the minis because they fit perfectly in the small cookie. Plus, you don’t have to unwrap them!

The cookie turns out super soft, not at all fall apart and crumbly like some blossom cookies I’ve had. The peanut butter cup is the perfect addition, and the marshmallow adds a little chewiness.

These are my favorite blossom cookies ever!

Peanut Butter S'more Blossoms sitting on a white plate with marshmallows spread around

These are so yummy just cooled, while the peanut butter cup is all melty. Once the peanut butter cup cools and re-solidifies, these are perfect for stacking or taking on the go. They can even be frozen!

Then you can’ have s’mores all summer long. Just sayin’

Peanut Butter S'more Blossoms with one split in half sitting on a white plate

Peanut Butter S'more Blossoms sitting on a white plate with marshmallows spread around and text on top

Peanut Butter S’more Blossoms

4 from 1 vote
A peanut butter blossom with a mini peanut butter cup and marshmallow stuffed inside - a s'more blossom!
Yield 4 dozen cookies


  • 1/2 cup butter softened
  • 3/4 cup peanut butter
  • 3/4 cup packed brown sugar
  • 1/2 cup granulated sugar divided
  • 1 large egg
  • 1 teaspoon vanilla
  • 1 tablespoon milk
  • 1/4 teaspoon salt
  • 1/2 teaspoon baking soda
  • 1 3/4 cups flour
  • About 48 mini marshmallows
  • About 48 Reese’s Minis


  • Preheat oven to 350°F. Line 2 cookie sheets with parchment or silpat baking mats. Place 1/4 cup granulated sugar in a bowl and set aside.
  • Cream butter, peanut butter, and brown sugar, and 1/4 cup granulated sugar in the bowl of an electric mixer fitted with the paddle attachment. Add egg, vanilla, milk, and salt and baking soda. Mix until combined. Slowly add flour and mix until dough comes together.
  • Scoop 1 tablespoon sized balls of dough and roll them in the bowl of sugar. Place on cookie sheets. Bake for 7-8 minutes, until the bottoms just begin to look brown. Remove from oven and immediately press a hole in the center of each cookie with the back of a wooden spoon. Insert a mini marshmallow in the hole and place back in the oven for 30 seconds. Remove from oven and stick a Reese’s Mini on top of the marshmallow, pressing gently to fit it into the hole without cracking the cookie. Cool completely before removing from cookie sheets.
  • Store in an airtight container for up to 3 days. They can be frozen in sealable containers or ziploc bags between layers of paper towels for up to one month.
Nutritional information not guaranteed to be accurate

Click here to see more PEANUT BUTTER recipes!

Click here to see more of my Christmas cookie recipes!

Peanut Butter Cookie S’mores

Reese's Peanut Butter Cookie S'mores sitting on parchment paper

Brownie Cookie S’mores

brownie-cookie-smores sitting on white parchment paper

Peanut Butter Cookie Dough Bark

Patriotic Peanut Butter Cookie Dough Bark sitting on a white plate with red and blue straws around

Sweets from friends:
Reese’s S’more Magic Layer Bars by Eat Cake for Dinner
S’more Hand Pies by Oven Adventures
Nutella S’mores Crepes by Something Swanky

Last Updated on May 13, 2020

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

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  1. Where do you come up with all of these creative ideas?? These are definitely my favorite blossom variety yet! Chocolate, extra PB, a marshmallow… And no campfires either. Yum!! 🙂 And hopefully Jordan waits a few weeks before losing another tooth. I’ll bet the tooth fairy’s wallet is getting a little light these days!

  2. I remember the tooth a week days. We had a very absent-minded tooth fairy at our house. These cookies look amazing.

  3. I love the idea of the marshmallows in these cookies!! I actually just made PB cookie cups with the mini reese’s too! I LOVE those things because there is no unwrapping involved!

    With three kids of my own, I feel like teeth are falling out all the time! I am DONE with the dang tooth fairy!! “She” has forgotten to come 4 times in the past few months. But I came up with a few great excuses. Here are two of my favorite: “The tooth fairy can’t fly in the rain” and “If the tooth falls out after 3 PM she doesn’t come till the next night” And if all else fails, just make cookies!! 🙂

  4. Hi Dorothy,
    I’am Chantal from Travelling Papilles, I’am very happy to discover your nice blog and this so beautilful recipe!
    I like the combination of marshmallows and peanut better

  5. Dorothy! These look fantastic! I love anything S’mores, but the addition of the peanut butter cookie is like, beyond words! YUM!

  6. These are one of my favorite cookies! What a delish twist on a classic. Love these, Dorothy!

  7. I found these in my never-ending search for ways to combine peanut butter and chocolate. I can’t imagine anything better than a cookie with a Reese’s Peanut ButterCup in it! I think these will be dangerous.

  8. Wow, these look amazing! I love the addition of the mini marshmallow 😀 You just can’t go wrong with peanut butter and chocolate.