No one can resist these scrumptious Thin Mint Brownies. Rich, fudgy brownies are spread with lightly minted marshmallow creme, then sprinkled with crushed Thin Mints. What’s that you say? Over the top? I can’t hear you. Originally published March 5, 2015.
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Sometimes we get together with Eric’s out-of-state siblings (on a Google Hangout) and play board games. We were playing Scattergories the other day when I caught Eric writing something down after the buzzer had gone off. “CHEATER!!!!” I yelled as loud as I could, and we all started verbally abusing him.
He looked at me with puppy dog eyes and earnestly said in an undertone, “I was writing you a note, Karen…”
Well then, my heart melted, and my eyes went starry, and I said, “Really?” I fully repented. What a sweet husband.
I was about to tell you all about it, because everybody loves a sappy story now and then. (No? Just me?) So I asked him a few minutes ago what he was writing me.
“Oh. Totally cheating. I can’t believe you guys bought that.”
(Cue punching.) Never again. My heart is now encased in ice. Watch out, Eric. The board game police are gonna HUNT YOU DOWN.
These gooey Thin Mint brownies are over-the-top delicious
But back to the sappy love story. Let’s talk about these brownies. (If these aren’t a sappy love story, then I don’t know what is.) My favorite recipe for rich, fudgy brownies (made with brown butter…yes, the obsession continues), smothered with marshmallow and mint cookies. You could use a box mix if you want. I won’t judge.
The marshmallow creme only has a few drops of peppermint in it. Like maaaaybe an 1/8 teaspoon. I have this terrible habit of adding too much peppermint to desserts and ruining them. When I made this the first time, I added a 1/2 teaspoon. DON’T DO THAT. You may as well spread toothpaste all over your brownies, the whole tube. THESE brownies, though, are the perfect level of mint, which is to say, not in your face. Perfect for St. Patrick’s Day!
Key ingredients
- Marshmallow crème melts into the chocolate for a silky, fudgy texture. SO GOOD.
- Peppermint extract. A little goes a long way, so count your drops.
- Green food coloring. It´s purely for looks, and you only need a few drops to get that classic Thin Mint look.
- Crush up some Girl Scout Thin Mints or mint Oreos and sprinkle them on top for a little extra crunch and mint flavor.
How to make the Thin Mint brownies of your dreams
Brown the butter in a saucepan until it turns golden and smells nutty. When you see little dark bits in the butter you know it’s ready.
Pour the butter over the sugar, cocoa, and salt. Mix until smooth, then stir in the water, vanilla, eggs, flour, and chocolate chips. The batter will be thick, and that’s perfect. Bake as directed and then let the brownies cool completely.
For the topping, chop up the cookies and soften the marshmallow crème in the microwave.
Stir in the peppermint extract and a few drops of green food coloring. Spread over the cooled brownies and sprinkle with the chopped cookie pieces.
Let the topping set for a few minutes before digging into them.
How to store leftover brownies
These brownies keep beautifully, which is great news if you somehow manage not to eat the whole pan in one sitting. Store leftover brownies in an airtight container at room temperature for up to 3 days, or refrigerate them for up to a week. I actually prefer them chilled.The mint layer firms up a bit, and they taste even more like a frozen Thin Mint cookie.
These are meant to be served at room temperature or cold, so there’s really no need to reheat them. If they’ve been in the refrigerator, let them sit on the counter for 15–20 minutes if you want a softer, fudgier texture.
Can I freeze leftover brownies?
These brownies freeze surprisingly well! Slice them into individual squares, then place them on a baking sheet to freeze until firm. Transfer the frozen brownies to a zip-top freezer bag or an airtight container, separating layers with parchment paper. They’ll keep for up to 3 months. Thaw overnight in the refrigerator.
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The Thin Mint Brownies of Your Dreams
Ingredients
For the brownies
- 3/4 cup salted butter
- 1 & 1/4 cups granulated sugar
- 3/4 cup unsweetened cocoa powder
- 1/4 teaspoon salt
- 1/2 tablespoon water
- 1 teaspoon vanilla extract
- 2 eggs
- 1/2 cup all-purpose flour
- 1/2 cup semi-sweet or dark chocolate chips
To top:
- 1 7-oz. jar marshmallow crème
- 1/8 teaspoon or less peppermint extract
- 10 drops green food coloring
- 15 thin mints or mint Oreos, roughly chopped
Instructions
- Preheat oven to 350 degrees F.
- Line an 8×8 or 9×9 inch baking dish with aluminum foil and spray with nonstick spray. Or just spray the pan.
- Melt butter in a large saucepan over medium heat. Stir occasionally. The butter will foam up, then back down and start forming brown colored milk solids or “bits”. When it is a nice light brown and it starts to smell like you could drink it straight, that’s when you know it’s done.
- (You can skip this step and just melt the butter if you want. The brownies don’t taste like brown butter, this step just makes them extra rich.)
- While your butter is browning, combine sugar, cocoa, and salt in a bowl or stand mixer.
- Once the butter is nice and brown, immediately pour the butter into the bowl with the sugar and cocoa (so that it stops cooking. You don’t want it to burn). Beat the mixture until it is smooth.
- Add the water and vanilla. Add the eggs, mixing quickly so they don’t curdle (if your butter is still pretty hot).
- Add the flour and chocolate chips and mix until just incorporated. Batter will be about the consistency of cement. Have a taste. It’s awesome.
- Use a sturdy rubber spatula to spread batter in the prepared pan. Bake for 25-30 minutes until toothpick inserted comes out clean.
- Let the brownies cool. Or stick them in the freezer for 10 minutes like I did and call it good.
- Peel all the foil off the top of the jar of marshmallow creme. Microwave for 15-20 seconds, or until it just starts to rise above the lip of the jar.
- Scoop the creme into a bowl or stand mixer. Add a little peppermint extract and green food coloring. Mix well, scraping sides.
- Pour the marshmallow creme over the brownies and spread to the edges.
- Top with the chopped thin mints, pressing in lightly with your hands if necessary. Let the marshmallow settle back to room temperature before cutting and serving.
Notes
Nutrition
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Karen, I’ve tried mint chocolate ice-cream, but I’ve never tried anything like these brownies. This looks so exciting!! Can’t wait to try it out. Thank you very much for this delicious recipe :)
Thanks Mary! I hope you love it. These are a personal favorite of mine!
These are AWESOME.
You are too funny! Love your stories :) And LOVE these brownies, wow do they ever look delicious!
Well, hello lover. I think you should stop by my house this evening, with all of your minty, chocolate-oozing goodness. Seriously, these look amazing. Pinned.
These look scrumptious, delicious, yummy….Oh my word !!! :-)
Thanks Lynne! Just wait til you try them! :)
I’m not much of a Girl Scout cookie person ( I know *gasp*) but these gooey brownies look kind of amazing!
Shhh I’m kinda with you Chels. I would always prefer a warm cookie out of the oven…or brownie, topped with a cookie…I’ve got issues, haha.
Umm, woah. These brownies are over-the-top incredible! They look amazing (and perfect for St. Patty’s Day!)
What a sweet recipe, Karen :) Thanks you for sharing it with us! :)
Oh, goodness, Karen! These are so awesome! & playing a board game via google hangout is just genius! BUT you won’t find me there because I’ll be stuffing my face with these brownies ;)
hahaha oh my gosh your husband! How funny! That’s so something mine would do and I would believe him!
And these brownies – they look outrageously good!
I totally love sappy love stories! I wish it were true… Thanks Eric, for bursting my bubble. ;) When my guy had to go to Taiwan a few years ago, I actually wrote him a note for every single day he was gone. What totally surprised me was when I found ALL of them when we moved last summer — he kept them!! Guess he’s kind of a romantic too. Anyway. These brownies. Definitely fall under the Amy category of romance. They look SO good!