These Thick and Chewy M&M Blondies are an easy dessert when you don’t want to cook multiple batches of cookies. One pan and you have 24 bars to feed a crowd.
This chewy blondies recipe is a family favorite and is so easy to change up the color of the M&M’s for different holidays!

Recipe Ingredient Notes
To make Thick and Chewy M&M Blondies, you will need the following ingredients:
- Butter (we used unsalted butter)
- Brown Sugar
- White Sugar
- Eggs
- Vanilla Extract
- Flour
- Baking Soda
- Salt
- Chocolate M&M candies
Equipment Needed
For this recipe, you only need a few simple kitchen tools. We recommend using the following equipment:



How to make Thick and Chewy M&M Blondies:
- Preheat oven to 350℉. Spray a 9 x 13 inch pan with non stick cooking spray.
- In a medium sized bowl combine the butter, brown sugar, and sugar and mix until combined.
- Add in eggs and vanilla into the sugar mixture.
- In a separate bowl mix together the flour, baking soda,and salt.
- Add the flour mixture to the sugar mixture and stir until all combined.
- Fold in 1 cup M&M candies.
- Place batter into the prepared pan and smooth the top so the batter touches the edges.
- Press in extra ⅓ cup M&M’s into the top of the batter.
- Bake for about 23-25 minutes or until golden brown. You can also insert a toothpick to see if it comes out clean to test for doneness.
- Cool completely and cut into squares.

Storage Suggestions
If you manage to have any leftover Bars + Brownies, these can store well if prepped appropriately. Once they have cooled completely, here is how you can store it:
- Refrigerator: Place in an airtight container and refrigerate for up to 1 week. Let them come to room temperature before serving for the best texture and flavor.
- Freezer: To freeze, make sure bars and brownies are completely cooled and unfrosted. Wrap tightly in plastic wrap (or Press & Seal) and then place in a freezer-safe bag or container. For easier portioning, wrap individual squares before freezing. Don’t forget to label with the date. They’ll stay fresh in the freezer for up to 3 months.
- Counter: Store bars and brownies in an airtight container at room temperature for up to 4 days. If your kitchen is particularly warm, consider refrigerating instead to prevent them from getting too soft or melty.
Other Add Ins for these Chewy M&M Cookie Bars:
- Chocolate Chips
- Butterscotch Chips
- Crushed Oreos
- Chopped Snickers Bars
- Chopped Twix Bars
- Sprinkles
- Mini m&m candies
- White Chocolate Chips
- Chopped Butterfingers
- Cookie Dough Chunks
Enjoy More Delicious Blondies Recipes
There’s nothing better than an easy brownie or bar recipe. Check out our comprehensive list of brownies, bars, and blondies here.
- Butterscotch Chocolate Chip Blondies
- Cadbury Mini Egg Blondies
- Applebee’s Copycat Maple Butter Blondies
- Chocolate Chip Cheesecake Blondies

Thick and Chewy M&M Blondies Recipe
Ingredients
- ¾ cup butter, softened to room temp
- 1 cup brown sugar
- ½ cup sugar
- 2 eggs
- 2 teaspoons vanilla
- 2 cups flour
- ¾ teaspoon baking soda
- ½ teaspoon salt
- 1 ⅓ cups milk chocolate M&M's , divided
Instructions
- Preheat oven to 350℉. Spray a 9 x 13 inch pan with non stick cooking spray.
- In a medium sized bowl combine the butter, brown sugar, and sugar and mix until combined.
- Add in eggs and vanilla into the sugar mixture.
- In a separate bowl mix together the flour, baking soda,and salt.
- Add the flour mixture to the sugar mixture and stir until all combined.
- Fold in 1 cup M&M candies.
- Place batter into the prepared pan and smooth the top so the batter touches the edges.
- Press in extra ⅓ cup M&M's into the top of the batter.
- Bake for about 23-25 minutes or until golden brown. You can also insert a toothpick to see if it comes out clean to test for doneness.
- Cool completely and cut into squares.
Notes
- Chocolate Chips
- Butterscotch Chips
- Crushed Oreos
- Chopped Snickers Bars
- Chopped Twix Bars
- Sprinkles
- Chopped Butterfingers



















Oh yes! you guys would be very popular in my house with a plate of these!!
Mary x
I was JUST thinking the other day that I wanted to make some blondies! Thank you!
These bars looks so easy and so delicious! I could go for a blondie or two 😉
Mmmmm…I love blondes!
http://www.cancerinthecity.com
Hey FYI your link to the cake batter blondies goes to the butterfinger ones instead!
Delish! And if you are not a “made from scratch” kind of girl 🙂 try Trader Joe’s blondie mix in a box. Just add eggs, butter and toppings. 🙂
http://www.thelinkshoppe.com
These look awsome!!!
Do they freeze well???
Hope so – as I would eat the whole batch!!!
Please tell me they freeze well
Cheers
Catie
Yes! They freeze well. Just be sure they are in a good freezer bag or airtight container. -The Six Sisters
I’ve never made anything like this – looks great!
Happy Monday!
Sheree
The Hartungs Blog
thehartungs.blogspot.ca
Is that really baking soda? Or baking powder?
Is that really baking soda? Or baking powder?
I love a good Blondie and these look amazing! Thanks for sharing at Show Me Your Plaid Monday’s!
It’s really baking soda.
These look great!! Thanks for joining in Simple Supper Tuesday!
Thanks!
These look so good! I’ve been on the hunt for a good Blondie recipe so I’ll have to give these a try! Thanks for sharing
Shannon
http://ikneadtobake.blogspot.com/
Mmmm. These look so yummy!
mothersniche.com
I have such a weakness for M&M’s…they are just so yummy! This looks like it would work perfect for my addiction. Plus I could use the seasonal M&M’s and call it Easter (or whatever holiday) blondies! Thanks for the recipe and for sharing at my Real Family Fun link party.
KC
These look yummy! I just made blondies last night with reese’s pieces.
What a yummy looking bar– it doesn’t get any better! I’m so glad you came to share at Super Saturday Show & Tell… come back again next week to party with me again 🙂 xoxo~ Ruthie
Oh yum!! I normally don’t make blondies because I’m such a chocolate eater, so these are the ones for me 🙂 Thanks for sharing at my link party last week!
-Angie
http://www.easylivingmom.com
These look delicious! We have plenty of M&Ms around right now because we are potty training our youngest with them… this sounds like a treat for the rest of us! 🙂 Thanks for sharing this last week on Saturday Show & Tell on Cheerios and Lattes! You are Featured Favorite this week; we can’t see what you six have been up to this week!
Mackenzie 🙂
Do you reserve part of the 1 cup of M&Ms for the top? or did you add additional M&Ms?
Add additional M&Ms to the top. Use the 1 cup for the batter.
These seriously look so good! Thanks for linking up to The Best Blog Recipe?s Weekend re-Treat #6!
Wanted to stop by and pin your image to My Link Parties Craft/DIY & Recipe Boards while I was here.
Hope you have a great rest of your week 🙂
Shauna
http://thebestblogrecipes.blogspot.com/
http://ready2loseweight.blogspot.com/
Made these, love them. One question. Mine were darker in color than yours are in the picture. Did you use regular brown sugar or did you edit your photo to make it a lot lighter? Just curious why mine would be darker. Thanks.
We’ve used the light brown sugar and the dark brown sugar when we have made these. Doesn’t change the taste at all.
hi there, when do you put the m&m’s on top? before of after baking? thanks!
If your going to post a recipe test it more than a few times. This recipe baked longer than you said. It looked done but was not. I hate throwing away food. This recipe is wrong. Too high of a sugar content. Embarrassing.
These were okay sadly enough they look better than they tasted just my opinion not sweet enough maybe needed regular sugar as well.
Made two pans of these for a college lacrosse tailgate. I used Reese’s pieces & candy corn in one, and white & dark choc chips in the other. Very sweet but all the girls loved them. Easy recipe for all seasons – use your imagination for add ins.
I hate to be a Debbie Downer…but this recipe did not work at all for me. Very disappointing! And of course I made them late evening for my 5th graders class function the following day and was in a bind when they flopped. An equal sugar and flour ratio seems to be the biggest problem. I baked mine for almost an hour and they are still way too gooey and underdone in the middle. I ffollowed the recipe exactly. Perhaps a few more test runs are in order. It is very disappointing to waste time, energy and ingredients on a recipe that I should have confidence in.
Could you use a smaller glass pan to make them thicker?
You could, but your cooking time will need to be longer. Being thicker, they will need extra cooking time.
This recipe is so easy and the blondies come out delicious! It’s my go to for church potluck dinners!
I made these for a ladies’ luncheon with pastel colored M & M’s for spring. They were a big hit!
I made these today o added heath bits and chocolate chips and m&m they was soft and yummy i will make it again