Thin Mint Rice Krispie Treats
These Thin Mint Rice Krispie Treats take everything you love about classic marshmallow squares and pull them into a cool, chocolate-mint swirl of nostalgia. Think crispy cereal, gooey marshmallow, crushed cookies tucked throughout, and a glossy chocolate top that sets into a soft snap.
GLUTEN FREE DESSERT RECIPE
Lauren Vasnelis
7/1/2026
Thin Mint Rice Krispie Treats 🍫🌿
These Thin Mint Rice Krispie Treats take everything you love about classic marshmallow squares and pull them into a cool, chocolate-mint swirl of nostalgia. Think crispy cereal, gooey marshmallow, crushed cookies tucked throughout, and a glossy chocolate top that sets into a soft snap.
Using Goodie Girl Gluten-Free Thin Mint cookies keeps them gluten-free, but regular Thin Mints work just as beautifully if that’s what you’ve got on hand. They’re quick to make, dangerously easy to slice, and built for bake sales, holidays, or late-night “just one square” situations that never stay one square.
Yield
9 squares
Time
Prep Time: 15 minutes
Cook Time: 5 minutes
Cooling Time: 1 hour
Ingredient Breakdown
Marshmallows
The molten backbone of the whole operation. They melt into that signature stretchy, chewy Rice Krispie texture that holds everything together like edible glue with personality.
Thin Mint Cookies
Chocolate-mint crunch scattered through every bite. Goodie Girl Gluten-Free Thin Mint cookies keep things gluten-free, but classic Thin Mints work perfectly too.
Peppermint Extract
A tiny splash transforms the whole pan into a cool mint breeze. Go slow here. This ingredient is powerful and dramatic in the best way.
Rice Krispies Cereal
The crisp, airy structure that keeps the bars light instead of dense.
Chocolate Chips
A smooth melted topping that turns these from snack into dessert moment. Dairy-free or regular, both work.
Ingredients
Main Ingredients
4 tablespoons dairy-free butter (or regular butter)
10 ounces mini marshmallows (or regular marshmallows, quartered)
12–15 Thin Mint cookies, crushed (Goodie Girl gluten-free or regular)
½ teaspoon peppermint extract
4 cups Rice Krispies cereal
10 ounces chocolate chips (dairy-free or regular)
Instructions
Line an 8Ă—8-inch baking dish with parchment paper or lightly grease it.
In a large saucepan over medium-low heat, melt butter and marshmallows together.
When marshmallows are almost fully melted, stir in peppermint extract. Start light. It intensifies quickly.
Stir until smooth and fully combined, keeping heat low to avoid scorching.
Fold in Rice Krispies cereal and crushed Thin Mint cookies until evenly coated. The mixture will be sticky and thick.
Press mixture into the prepared pan in an even layer.
Let cool at room temperature for at least 1 hour. Do not refrigerate at this stage.
Melt chocolate chips until smooth.
Spread melted chocolate evenly over the cooled bars.
Let chocolate set at room temperature, or refrigerate briefly if you want a faster set.
Slice into 9 squares and serve.
Notes
Peppermint extract is strong. A little goes a long way.
Mini marshmallows melt faster, but quartered regular marshmallows work just fine.
Cooling at room temperature keeps the texture soft and chewy.
Refrigeration is best saved for after the chocolate topping is added.
Store in an airtight container at room temperature for up to 4 days.
Frequently Asked Questions
Can I use regular Thin Mint cookies?
Yes. Goodie Girl gluten-free versions keep this recipe gluten-free, but regular Thin Mints work perfectly.
Can I use regular butter?
Absolutely. Dairy-free butter is optional, not required.
Can I use regular chocolate chips?
Yes. Semi-sweet or dark chocolate chips both work well.
Why shouldn’t I refrigerate them while cooling?
Room temperature cooling preserves that soft, chewy Rice Krispie texture. Refrigerating too early makes them firmer and less gooey.
Can I freeze these?
Yes. Wrap individually and freeze up to 2 months. Thaw at room temperature before serving.
Can I add toppings?
Definitely. Try crushed Thin Mint cookies on top of the chocolate, a drizzle of extra melted chocolate, festive sprinkles, or a pinch of flaky sea salt for contrast. I didn't add toppings simply because I wanted it to better resemble the original Girl Scout Cookie.
