Description
If the word Fluffernutter evokes images of childhood lunchboxes and simple, perfect joy, then preparing a batch of Fluffernutter Sandwich Cookies is like bottling that happiness. This dessert takes the iconic New England sandwich—peanut butter and marshmallow fluff between bread—and transforms it into an elegant, yet approachable, baked treat. Instead of bread, you have two soft, chewy peanut butter cookies, and replacing the sometimes-sticky original is a light, fluffy marshmallow filling whipped with butter and vanilla.
Ingredients
Peanut Butter Cookies
½ cup unsalted butter, softened
½ cup granulated sugar
½ cup brown sugar
¾ cup creamy peanut butter
1 large egg
1 tsp vanilla extract
1½ cups all-purpose flour
½ tsp baking soda
¼ tsp salt
Marshmallow Filling
1 cup marshmallow fluff
½ cup unsalted butter, softened
½ tsp vanilla extract
1 cup powdered sugar
Instructions
Make the cookies
Preheat oven to 350°F (175°C).
Line baking sheets with parchment.
Cream butter, sugars, and peanut butter until light and fluffy.
Beat in egg and vanilla.
Mix in flour, baking soda, and salt until just combined.
Scoop 1½ tbsp dough, roll into balls, and flatten slightly with a fork.
Bake 9–11 minutes, until edges are set.
Cool completely.
Prepare the filling
Beat butter until smooth.
Mix in marshmallow fluff and vanilla.
Gradually beat in powdered sugar until fluffy and spreadable.
Assemble
Spread or pipe filling onto the flat side of one cookie.
Top with another cookie, gently pressing together.
Notes
For a fun twist, roll the cookie edges in chopped peanuts or drizzle with melted chocolate before serving. You can also swap in crunchy peanut butter for extra texture or add a pinch of flaky sea salt to balance the sweetness. Perfect for bake sales, parties, or nostalgic treats.
- Prep Time: 20 minutes
- Cook Time: 12 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 sandwich cookie
- Calories: ~290 kcal
Keywords: peanut butter marshmallow cookies, fluffernutter recipe, homemade sandwich cookies, peanut butter fluff dessert