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Peanut Butter S'mores Sandwich Cookies

Emily
Gooey, chocolatey, and full of nostalgic flavor, these Peanut Butter S’mores Sandwich Cookies combine soft peanut butter cookies with melted chocolate and marshmallow fluff—no campfire required!
Prep Time 20 minutes
Cook Time 10 minutes
Chill Time 10 minutes
Total Time 40 minutes
Servings 12 sandwich cookies
Calories 310 kcal

Ingredients
  

  • 1 cup creamy peanut butter
  • ½ cup granulated sugar
  • ½ cup brown sugar
  • 1 egg
  • 1 teaspoon vanilla extract
  • ½ teaspoon baking soda
  • ¼ teaspoon salt
  • 1 cup chocolate chips melted
  • 1 cup marshmallow fluff

Instructions
 

  • Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
  • Mix peanut butter, sugars, egg, vanilla, baking soda, and salt in a bowl until a thick dough forms.
  • Roll into 1-inch balls, flatten slightly on baking sheet.
  • Bake 8–10 minutes. Cool 5 minutes on pan, then transfer to wire rack.
  • Melt chocolate chips in microwave-safe bowl in 30-second intervals.
  • Spread marshmallow fluff on half the cookies, chocolate on the other half. Sandwich together.
  • Let sit 10–15 minutes before serving.

Notes

  • Spray utensils to make spreading marshmallow easier.
  • Use dark chocolate for a richer taste.
  • Press graham cracker crumbs into marshmallow layer for extra flavor.
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