Gluten Free Peanut Butter Marshmallow

My kitchen counter was a disaster of flour dust and failed cookie experiments the afternoon I stumbled onto this no-bake revelation. I had exactly four ingredients, a saucepan, and zero patience left for preheating ovens. What came together in fifteen minutes was so absurdly good that my neighbor, who stopped by to borrow scissors, ended up eating three squares standing at the counter.

I packed these in my daughters lunchbox once and got a text from her friends mom asking, rather urgently, for the recipe. That little square of peanut butter and marshmallow has traveled to potlucks, road trips, and one memorable midnight snack session where my husband and I polished off half the pan watching old sitcoms.

Ingredients

• 1 cup creamy peanut butter (ensure gluten-free): Use the kind you would eat straight from the jar because that flavor is the backbone of every square.
• 1/2 cup unsalted butter: This adds richness and helps everything set with a smooth, fudgy consistency.
• 1 1/2 cups gluten-free powdered sugar: It sweetens and thickens the base into something that holds its shape when chilled.
• 1 teaspoon pure vanilla extract: A small amount that rounds out the sweetness and adds warmth to the peanut flavor.
• 3 cups mini marshmallows (certified gluten-free): The stars of the show, folding them in gently keeps them pillowy rather than turning into a sticky mass.
• 1/2 cup gluten-free chocolate chips (optional): Scattered on top, they add a little snap of chocolate that makes these feel finished and special.

Instructions

Prepare your pan:

Line an 8x8-inch baking pan with parchment paper, letting the edges hang over like handles so you can lift the whole block out later without any struggle.

Melt the base:

In a medium saucepan over low heat, melt the peanut butter and butter together, stirring gently until the mixture looks silky and smells like the inside of a candy shop.

Build the fudge:

Take the pan off the heat and stir in the powdered sugar and vanilla, mixing until everything comes together into a thick, glossy dough that pulls away from the sides.

Fold in the marshmallows:

Let the mixture cool for two to three minutes so the heat will not dissolve the marshmallows, then fold them in with a spatula using gentle sweeping motions until every single one is coated.

Press and top:

Pour everything into your prepared pan and press it out evenly with the back of a spoon, then scatter chocolate chips across the surface if you are using them and press lightly so they stick.

Chill until set:

Refrigerate for at least one hour until the squares feel firm to the touch, then lift the block out using the parchment edges and cut into sixteen squares with a sharp knife.

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The first time I served these at a holiday party, a friend who usually avoids everything gluten-free went back for thirds and asked if I was sure they were not regular. That moment of someone tasting beyond a dietary label and just enjoying something for what it is stays with me every time I make them.

When You Need a Dessert in a Hurry

These squares are my emergency dessert, the thing I make when someone calls and says they are stopping by in twenty minutes and I have nothing prepared. The no-bake nature means you never have to wait for an oven or worry about underbaking. As long as you have peanut butter and marshmallows in your pantry, you are never more than fifteen minutes of effort away from something that feels intentional and generous.

Making It Your Own

Sunflower seed butter works beautifully if peanuts are off the table, though the color will be slightly darker and the flavor earthier in a way I actually love. A sprinkle of chopped roasted peanuts on top before chilling gives a satisfying crunch that contrasts the soft interior. I have also pressed a pinch of flaky sea salt into the chocolate topping on more than one occasion and it turns a simple treat into something that tastes far more sophisticated than the effort suggests.

Keeping Them Perfect

Store these squares in an airtight container in the refrigerator and they will stay chewy and fresh for up to a week, though in my house they never last that long. You can also freeze them layered between sheets of parchment for up to two months.

• Let frozen squares sit at room temperature for about ten minutes before eating so they soften slightly.
• Cut them smaller than you think you need because they are rich and people always want seconds.
• Always keep them chilled until serving since warm peanut butter fudge has a tendency to soften into a messy but delicious situation.

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Some recipes earn their place in your rotation through complexity and technique, but this one earns it through pure convenience and joy. Keep it in your back pocket for the moments when you need something sweet without the fuss.

Recipe FAQs

→ How do I keep the marshmallows from melting?

Allow the peanut-butter mixture to cool 2–3 minutes before folding in the marshmallows and fold gently so they become coated without fully melting.

→ Can these be made ahead of time?

Yes. Refrigerate up to 5 days in an airtight container. For longer storage, freeze wrapped squares up to 3 months and thaw in the fridge before serving.

→ What can I use instead of peanut butter?

Sunflower seed butter is a good nut-free substitute; almond or cashew butter work too. Note flavors and oil content vary, so adjust powdered sugar for texture.

→ Why use powdered sugar in the base?

Powdered sugar firms the mixture and balances the oiliness of the nut butter. Sift if clumpy and add gradually until you reach a pliable texture for pressing.

→ Any tips for cutting neat squares?

Chill the pan fully until set, then run a sharp knife under hot water, dry it, and slice in straight strokes for cleaner edges.

→ What mix-ins or toppings work well?

Chocolate chips, chopped roasted peanuts, or a light sprinkle of flaky sea salt enhance texture and flavor—press them lightly into the surface before chilling.