One bite of these chocolate brownie M&M cookies and you will be hooked. They taste like the perfect fudgy brownie, and are jam packed with M&Ms and chocolate chips. I mean, what could be better?!

Key Ingredients for Chocolate Brownie M&M Cookies
- Unsalted butter for fat content and to allow the cookies to spread
- Brown sugar for sweetness and moisture
- Granulated sugar for even more sweetness
- Egg to build structure
- Vanilla extract for flavor
- All-purpose flour to build structure
- Cocoa powder to build structure and add the most amazing chocolatey flavor, of course!
- Baking soda to help the cookies rise
- Salt to enhance flavor
- M&Ms and chocolate chips the perfect mix-ins!
Yield
This recipe makes about 15-17 large cookies!

Method
These one bowl cookies are soooooo easy to make, that's why I love them.
First, melt your butter over the stove or in the microwave in 30 second increments, stirring every 30 seconds. Set aside for the melted butter to cool slightly.
Then, in a medium sized bowl, whisk together the brown sugar and granulated sugar. Pour in the melted butter and whisk together until completely combined. Add the room temperature egg and vanilla extract and whisk until combined.
Now we will add the dry ingredients right on top of the wet ingredients, so there is no need to dirty up anymore bowls! Add the flour, cocoa powder, baking soda and salt and fold together until a dough forms. Pour in your M&Ms and chocolate chips and fold together until evenly incorporated throughout the dough.

Put a piece of tin foil or plastic wrap over the bowl (this will prevent the dough from drying out) and put the bowl in the refrigerator and leave to chill for about an hour. When the dough only has 10 minutes left to chill, preheat your oven to 350 degrees Fahrenheit and line a baking sheet with parchment paper.
Measure out the cookies to be 60 grams (about 3 tablespoons) for large cookies, and place them on the baking sheet with 2-3 inches of space in between each cookie.
Bake for 14-16 minutes or until the edges have set. Let cool for 5 minutes on the baking sheet, then transfer to a cooling rack to cool completely or enjoy all warm and melty!

One Bowl Chocolate Brownie M&M & Chocolate Chip Cookies
Equipment
- Oven
Ingredients
- ¾ cup unsalted butter melted
- ¾ cup brown sugar packed
- ½ cup granulated sugar
- 1 egg room temperature
- 1 tbsp vanilla extract
- 1 ½ cups all-purpose flour spooned and leveled
- ½ cup unsweetened cocoa powder
- 1 tsp baking soda
- ½ tsp salt
- ½ cup M&Ms
- ½ cup chocolate chips
Instructions
- Melt your butter over the stove or in the microwave in 30 second increments. Set aside to cool for 5 minutes.
- In a medium sized bowl, whisk together the brown sugar and granulated sugar. Add the melted butter and whisk together until combined.
- Add the room temperature egg and vanilla extract and whisk until combine.
- Add the flour, cocoa powder, baking soda and salt and fold together until combined.
- Add the M&Ms and chocolate chips and fold together until evenly incorporated.
- Cover the bowl with plastic wrap/tin foil and place in the fridge to chill for about an hour. When the dough has 10 minutes left to chill, preheat the oven to 350 degrees Fahrenheit and line a baking sheet with parchment paper.
- Measure the dough out and roll into balls (about 60 grams or 3 tablespoons per dough ball) and place on the baking sheet with 2-3 inches in between each cookie. Bake in the oven for 14-16 minutes until edges are set.
- Let cool for 5 minutes on your baking sheet, then transfer to a wire rack to cool completely, or enjoy warm! Happy baking!
Tried this recipe? Make sure to rate and review and tag @sturbridgebakery on Instagram!
Gigi
Excellent!?
Jess Italiano
Thank you!! 🙂
Mary
These look sooo good I can’t wait to make them, do you recommend light or dark brown sugar?
Jess Italiano
Yayayay! I like light brown, but either works!
Eric
Amazing! So chocolatey and delicious! The receipt was super easy to follow too! Will definitely be making again =)
Jess Italiano
Awe I am so happy to hear that! I am glad you liked them. Thanks, Eric!
JG
Made a double batch of these for an office cookie exchange.... HUGE hit and probably some of the easiest cookies I've ever made. Thank you, thank you, thank you!
Jess Italiano
Awe thank you so much for making them!!! I am so happy everyone in enjoyed 🙂
Maram
They came out perfect!! It was a hit...ate 6 myself ! Chocolatey and melts in your mouth! I baked them for only 10 mins and they were devine.
Jess Italiano
Thank you so much Maram!! I ate a whole batch myself once, so I don't blame you!! 🙂
Emma
These are some of the best cookies I’ve tried. They really are like if a brownie and cookie had a child.
Jess Italiano
Hi Emma! I completely agree 🙂 Thank you so much for trying them and I am so happy you liked the recipe!
angela
literally perfect, i baked for a couple extra minutes for extra chewiness. thanks!
Jess Italiano
Awe, thank you Angela! I am so happy you liked 🙂
A
Hi. What kind of cocoa powder do you use for these?
Jess Italiano
Hi there! I just use regular unsweetened cocoa powder. NOT dutch processed.
Giulia
Hey there I was wondering, can I substitute the cocoa powder with dark chocolate?
Jess Italiano
Hi Giulia! I haven't tried it, so I cannot guarantee the results. Sorry!
Jennifer
These cookies are AWESOME and so addicting. You can’t have just one. Have made them twice in the last two weeks!!
Jess Italiano
Awe yay!!! I agree they are my fav. So happy you like!
Nancy
I just came upon this recipe. Got a huge bag of Christmas M&Ms and wanted to make cookies. One of the best chocolate cookies I’ve ever had, and I’m 67 and never comment. Thanks for the great recipe and Happy Holidays.
Jess Italiano
Thank you so much, Nancy!! That makes me so happy! I am glad you enjoyed.