Thin Mint Brownie Cookies

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So, uh, something sort of happened yesterday.

It was my birthday. I turned *whisper* 30 years old.

Yeah, that happened.

I really didn’t feel 30 years old until I was at the store ordering my own birthday cake.

“Can you please write Happy Birthday, Karly on there? In hot pink?”

Isn’t my mommy supposed to do that for me while I’m at home shaking the birthday presents and sneakily peeling back the wrapping paper and re-taping it?

In my mama’s defense, she had the flu and this was an in-law party that she wasn’t supposed to be at, anyway. Also, I offered to pick up the birthday cake. And then proceeded to insist that I be the one to get the cake, because I didn’t want to impose on the host.

So, I’m not complaining, I’m just saying. Nothing makes you feel older than ordering your own birthday cake.

Or so I thought until I woke up this morning. I spent my birthday installing a new floor in my kitchen. I feel sort of ouchy today. And by “sort of” I mean that I can’t move without crying out in pain. My children are hiding from me. Apparently the screechy sounds coming from my food hole are frightening them.

I can only imagine how my husband (who is 32 and therefore VERY old, way older than me, thankyouverymuch) is feeling after crawling around on his knees and bending over to measure every godforsaken piece of flooring in our house.

Let’s not even wonder about how my daddy (who came over to help) is feeling. He’s obviously much older than me and is probably at home in bed, completely unable to move. Then again, he’s in much better shape than I am, so he probably skipped to work at 5am this morning, whistling music from the 50s (because, like I said…he’s pretty old).

Thankfully, the only part of my body that doesn’t ache is my mouth/jaw area. Which means that I can chew on these Thin Mint Brownie cookies all day long without complaint.

These aren’t the prettiest cookies ever, but they couldn’t be easier to make. I just took a box of brownie mix and turned that into the cookie base and then stirred in an entire sleeve of crushed Thin Mints. These were perfectly minty, soft, and chewy.

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Thin Mint Brownie Cookies

Prep Time
10 mins
Cook Time
8 mins
Total Time
18 mins
Servings: 36 cookies
Course: Dessert
Cuisine: American
Keyword: easy cookie recipes, easy dessert recipes, kid-friendly recipes
Calories: 93 kcal
These cookies couldn't be simpler, since they start with a box of brownie mix! Stir in some crushed Thin Mint cookies and you have a delicious, minty treat.


  • 1 box brownie mix 18ish ounces
  • 2 large eggs
  • 1/4 cup melted butter 1/2 stick
  • 1 sleeve Thin Mints crushed


  1. Preheat the oven to 350 degrees. Line a baking sheet with parchment paper and set aside.
  2. In the bowl of your stand mixer, beat together the brownie mix, eggs, and butter until well combined.
  3. Stir in the crushed Thin Mints.
  4. Drop by rounded teaspoonfuls onto the prepared baking sheet with 2 inches space between each cookie. (You can make these larger, like I did, but the edges tend to crisp up more before the middle bakes. I preferred the smaller cookies.)
  5. Bake for 8-10 minutes or until cookies are set.
Nutrition Facts
Thin Mint Brownie Cookies
Amount Per Serving
Calories 93 Calories from Fat 27
% Daily Value*
Fat 3g5%
Saturated Fat 1g6%
Cholesterol 13mg4%
Sodium 71mg3%
Potassium 11mg0%
Carbohydrates 13g4%
Sugar 8g9%
Protein 1g2%
Vitamin A 55IU1%
Calcium 3mg0%
Iron 0.7mg4%
* Percent Daily Values are based on a 2000 calorie diet.

Nutrition Disclaimer: All information presented on this site is intended for informational purposes only. I am not a certified nutritionist and any nutritional information shared on should only be used as a general guideline.