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Chewy Blondie Recipe (Cookie Bars)

These are the best Chewy Blondie Cookie Bars that’ll ever grace your taste buds! They’re chewy, chocolatey, and so easy. Switch up your blondie recipe to fit any occasion throughout the year. 

blondie recipe, cookie bar, dessert bar

The Chewy Blondie Recipe You’ll Want Forever

If you’re on the hunt for the most chewy, most chocolatey, best blondie recipe on the planet, you’ve hit the mark right here, right now. I say that with the utmost humility of a cookie monster. 😇

Even if you weren’t foraging for a luscious blondie dessert, it must be serendipity that has you colliding with these marvelous cookie bars today.

This one-bowl blondie recipe is essentially fail-proof, teeming with festive M&M’s, and extra chocolate chips to captivate all the chocolate lovers in your life.

All you need: less than 10 ingredients, one big bowl, and sweet toothed tribe in your midst. In fact, I have a little story about this…

blondie recipe, cookie bar, dessert bar

Favorite Blondie Recipe

I’ve shared before that our family is part of a rockin’ team that’s committed to reaching out to our homeless friends every month.

That awesome team faithfully serves on outdoor street corners for hours at a time. Be it rain, snow, sleet, or shine…that’s no small commitment here in the Minnesota where baclava is an everyday word and nobody blinks twice when you go running around with one on.

Our monthly meal serves are one of our family highlights, as we really get to know our homeless friends when we share meals and spend time with them on a regular basis. Once I brought a huge platter of these very blondies to share with all our street friends. Not only did they cherish every morsel to the last crumb, many of were nostalgic about the homemade cookies.

My favorite gal devoured several of them and told me that these blondies reminded her of her grandma. She said when she was a little girl, nobody made cookies as good as her grandma did. But these humble blondies…they were just as good. I imagined her as that little girl, and I had no words.

Who knew something as simple as blondie cookie bars could do that?

blondie recipe, cookie bar, dessert bar

Tips for your best blondies

  • I use salted butter, but feel free to use unsalted if that’s what you have. Be sure your butter is softened to moderate room temperature, but not at all melty.
  • When measuring brown sugar, be sure it’s packed tightly. For best results, use a stand mixer or electric hand mixer to mix sugar and butter together until it’s light and fluffy. Don’t rush this process; it takes at least 2-3 minutes of continuous mixing on medium-high speed to “fluff up” the butter/sugar mixture
  • Let your egg come to room temperature before mixing it in; this helps dough mixture stay at correct texture.
  • When measuring flour, use the scoop & scrape method to ensure accurate measurement. You’ll want a dry-ingredient measurement scoop that does not have extra top margin.
  • Use a combination of semi-sweet chocolate morsels and M&M’s for plenty of chocolatey goodness and crunch. Change up your M&M colors to fit any occasion you’d like.

You may really like this one, too:

cookie bars blondies

One-Bowl Chewy Blondies Recipe (Cookie Bars)

5 from 6 ratings
These are the best Chewy Blondies (Cookie Bars) that'll ever grace your taste buds! They're chewy, chocolatey, and easier than cookies. Choose the color scheme of your blondie dessert for any occasion throughout the year.
Prep Time: 10 mins
Cook Time: 25 mins
Total Time: 35 mins
Servings: 20


  • ½ cup salted butter, soft but not melted
  • 1 cup brown sugar, packed
  • 2 tsp pure vanilla extract
  • 1 large egg, room temp
  • ¾ cup flour
  • ¼ tsp table salt
  • ½ cup semi sweet chocolate morsels
  • ½ cup M&M's for dough, plus 1/4 cup for garnish


  • Preheat oven to 350F with rack on lower middle position. Line 8x8 baking pan with parchment paper or foil, with enough excess to create a "sling" that reaches over the edges of pan for ease of dessert removal. Lightly grease the paper or foil. Set aside.
  • In bowl of stand mixer fitted with paddle attachment (alternatively, you can use a large mixing bowl and electric hand mixer) add the softened butter and brown sugar; mix on medium high until mixture if fluffy. Add vanilla and egg, mixing to combine. Slowly and gently add the flour and salt, switching to low speed; mix just until combined (do not over mix)
  • Using a rubber spatula, gently fold in the chocolate morsels and M&M's. Scrape dough into lined/greased pan, ensuring corners are filled evenly. Bake about 25 min or just until toothpick inserted in center comes out barely clean. A few tender crumbs attached are great.
  • Let cool completely in pan on wire rack. Carefully remove entire dessert with sling overhang, directly onto a cutting board. Cut into bars and plate to serve.


Loosely cover dessert with foil if top browns too quickly.
Keeps well in airtight container at moderate room temp for several days.
May be frozen in airtight container for several weeks.


Calories: 158kcal | Carbohydrates: 21.7g | Protein: 1.5g | Fat: 7.6g | Saturated Fat: 4.7g | Trans Fat: 0.2g | Cholesterol: 22.2mg | Sodium: 75.5mg | Fiber: 0.7g | Sugar: 17.3g
Course: Dessert, sweets, treats
Cuisine: American
Method: Bake

Did you make this?

Leave a comment below and tag @chewoutloud on Instagram

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Add a comment

Recipe Rating


    • Lisa

    yummy! looks so delicious!!

    • Chef Dennis
    • 5 stars

    This Chewy Blondie Recipe (Cookie Bars) looks really mouthwatering! My sons will definitely want to have this.

      • chewoutloud

      My boys love these! 🙂

    • Chelsea Sauve – Wandure

    These, as well as your many other delicious options, are being bookmarked right now! :)Thank you!

      • chewoutloud

      Thank you, Chelsea 🙂

    • Jessica Collazo
    • 5 stars

    This looks too good. I have to try this recipe. Looks so delicious.

    • Lisa Rios

    Oh wow, yum. These look so satisfying! I can’t wait to try this recipe.

    • Meghna Dixit

    Wow! Love this recipe. Thank you for sharing

    • NicoleShillings

    Mmm! These look delicious! It’s a rainy cold day here today and I was just thinking about baking some cookies. Thanks for the inspiration.

    • tanviidotcom

    These look SO good and delicious. I am trying to stay off sugar so this is exceptionally tempting right now.


  • These sound and look so delicious, love a bit of color you added on top 🙂 Love the presentation and your pictures. My kids would love these, will try this recipe.

    • Jen ~ The Tipsy Mama

    These look amazing! I run a daycare and we are having our Valentine’s Day Party next week…I think we are definitely adding these to our day! The kids will love helping with them as much as eating them!

      • chewoutloud

      Jen, they’ll totally love it! 🙂

    • Emily Fata

    These look soooo incredibly delicious! I love the added touch of the Valentine’s-themed chocolates in them to make them festive! I’ll have to make these myself this weekend. 🙂

    • Noelle Lynne

    These look fantastic, going to make this for niece and nephew so they have some lovely to take in their lunch on Valentines day!

    • forkwardthinkingfoodinista

    Erm…yes please!! These look great – I think I will make some of these for my friend as she loves cookies x

    • Elizabeth O

    Your posts always make my stomach rumble, the photography is amazing and the recipes even better, I have saved this, I need cookie bars in my life!

    • Megan B

    Ooooooo yes sign me up for a batch of these STAT! These look amazing, I have to try them ASAP.

    • Katie

    These look amazing! Once we recover a bit from winter sniffles I’d love to make some yummy treats.

      • chewoutloud

      Feel better soon, Katie! 🙂

    • Emily Terrell

    My husband and I had decided to go on a diet this year. We swore off sweets except for special occasions. I think that next week, I will have to have these and use Valentines Day as my exception….

      • chewoutloud

      Totally, Emily! 🙂 I’m coming off a 30-day sugar fast, and this is what I post right after 😉

    • dgutkowski

    BOOKMARKED! Thank you! So cute that you made them vday themed! I love love love love blondies!!

      • chewoutloud

      You’re welcome and thanks for saving the recipe! Hope you LOVE it! 🙂

    • kumamonjeng

    I think this would make a great Valentine gift! Making something from the heart is better than any gift you can receive. Thanks for the video clip and the picture. I like how there are red m&m in it. It just matches the theme for valentine day. I will challenge it!

    • Jenna

    Oh these look tasty! And so festive — perfect for valentine’s day next week 🙂

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