A Fluffernutter is exactly what it sounds like: creamy peanut butter and pillowy marshmallow fluff sandwiched between soft white bread. It’s insanely simple, gloriously sticky, and utterly New England. I make mine with thick slices, a diagonal cut, and zero apologies.
In this post I’ll walk you through a classic Fluffernutter plus a couple of rebellious variations (toasted, banana-studded, and salty-sweet). There’s nothing fancy here—just texture, nostalgia, and the pleasure of something gooey and impossible to resist.
Ingredients
- 4 slices soft white sandwich bread (or 2 thick slices per sandwich)
- 6–8 tablespoons creamy peanut butter (adjust for peanut-power)
- 6–8 tablespoons marshmallow fluff (marshmallow creme)
- 2 tablespoons unsalted butter (optional, for toasting)
- 1 small ripe banana, thinly sliced (optional)
- Flaky sea salt or Maldon (optional, to finish)
Tip: I like creamy peanut butter for the classic texture, but try crunchy if you want a toothsome contrast. Use good-quality marshmallow fluff—it makes the sandwich taste like childhood in a tub.
Instructions
- Lay out your bread. If you’re serving two sandwiches, start with four slices. For one generous sandwich, use two thick slices.
- Spread the peanut butter. Use a butter knife to smear 3–4 tablespoons of peanut butter evenly over one slice (or both slices if you like peanut butter on both sides).
- Add the marshmallow fluff. Using a clean knife or a small spatula, dollop 3–4 tablespoons of marshmallow fluff onto the other slice and spread, leaving a tiny margin at the edge to prevent runaway fluff.
- Assemble. Press the two slices together, peanut-butter side meeting fluff. Press gently so the spreads marry without squishing out the sides—unless you want the glorious mess.
- Optional—toast it. Heat a skillet over medium-low heat and add 1 tablespoon butter. Toast the sandwich 1–2 minutes per side until golden and the inside is gooey. Keep the heat low so the fluff softens instead of burning.
- Optional—banana & salt. Add thin banana slices before closing the sandwich for a creamy, fruity layer. Finish with a tiny pinch of flaky sea salt for contrast.
- Cut and serve. I always slice diagonally. Serve immediately—this sandwich is best hot or room temperature within minutes of assembly.
Tips & Notes
Make it ahead? Kind of. Assemble but don’t toast, then wrap in parchment for a couple of hours. Toasting beforehand creates a sticky outer surface that gets gloopy when stored.
Allergy swap: Use sunflower seed butter and a vegan marshmallow fluff for a peanut-free version (it’s still delightfully nostalgic).
Pro move: Replace one slice of bread with graham cracker halves for a s’mores-adjacent twist. Yes, it’s ridiculous. Yes, it’s delicious.
Why this sandwich endures
It’s simple—sugar and fat are a timeless combo. But the Fluffernutter is also a cultural thing. In New England it’s a childhood rite: lunchboxes, school cafeterias, and kitchen tables. The sandwich feels like a soft hug in edible form.
If you’ve ever wondered why you suddenly crave marshmallows, this post pairs well with my piece on cravings: Why Am I Craving Marshmallows?.
A Weird Food Fact
Marshmallow fluff itself has roots in the medicinal marshmallow plant—but the neon-tubed fluff we love was invented in the early 20th century as a sweet spread. The modern Fluffernutter name didn’t appear until decades later, and it’s now so iconic that there have been legislative debates in Massachusetts about protecting school lunch traditions. Who knew sandwich politics could be so sticky?
Takeaway: The Fluffernutter is comfort food that’s easy to make and even easier to love. Keep your bread soft, your peanut butter generous, and your marshmallow fluff unapologetic.