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Close-up of a warm Peanut Butter Marshmallow Cookies cookie showing gooey marshmallow pockets and a tender, golden edge — a cozy Gluten Free Peanut Butter Dessert.

Easy Gluten-Free Peanut Butter Marshmallow Cookies

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  • Author: Jennifer
  • Yield: 16 cookies 1x
  • Category: Dessert
  • Diet: Gluten-Free, Vegan

Description

Soft, pillowy cookies stuffed with creamy peanut butter and little marshmallow pockets — holiday baking, upgraded. These are naturally gluten-free (swap in regular flour if you prefer), chewy, and ridiculously easy to make. Freeze the minis first and you’ll get marshmallow nubs that stay delightfully bouncy after baking.


Ingredients

Scale
  • 1¼ cups gluten-free 1:1 baking flour (or sub all-purpose)
  • 1 tsp baking soda
  • ½ tsp fine sea salt
  • ½ cup unsalted butter, softened
  • ½ cup granulated sugar
  • ¾ cup packed brown sugar
  • ¾ cup creamy peanut butter (smooth is best)
  • 1 large egg
  • 2 tsp vanilla extract
  • 1¼ cups mini marshmallows, frozen


Instructions

  1. Freeze the marshmallows. Put the mini marshmallows in a sealed container and chill them for a few hours. This is the trick that keeps them from dissolving in the oven. Bold tip: Don’t skip this — frozen marshmallows give the best texture.

  2. Preheat the oven to 350°F (177°C) and line a baking sheet with parchment.

  3. In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.

  4. In a larger bowl, beat the softened butter with the granulated and brown sugars until smooth and slightly lighter in color.

  5. Add the creamy peanut butter, egg, and vanilla to the butter mixture. Beat until everything combines into a glossy dough.

  6. Pull the marshmallows from the freezer and fold them into the dough quickly so they don’t thaw.

  7. Add the dry ingredients to the wet and mix gently until a soft dough forms. Do not overmix.

  8. Scoop dough into balls (about 2–3 tablespoons each for large cookies) and place them 1–2 inches apart on the prepared sheet. Use a cookie scoop for uniform sizes.

  9. Bake for 10–11 minutes. The edges should set while the centers stay soft. Bold tip: Take them out when centers still look a little underdone — they finish while cooling.

  10. Let the cookies cool on the sheet for 8–10 minutes, then transfer to a wire rack to finish cooling.


Notes

Storage

Keep leftovers in an airtight container in the refrigerator for up to one week. You can also freeze baked cookies for longer storage — thaw in the fridge before serving.

Quick variations & ideas

 

  • Fold in a handful of chocolate chips or shredded coconut for a twist (great for Peanut Butter Cookies With Coconut).

  • Make them vegan by using a flax egg, plant-based butter, and gelatin-free marshmallows.

  • Want to bake on demand? Scoop dough balls onto a tray, freeze, then store in a bag. Bake straight from frozen — add 1–2 minutes to the time.