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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:


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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 minutes
Cook Time: 25 minutes
Total Time: 35 minutes
Servings: 20
Author: Amy Dong


  • 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.

Nutrition (per serving)

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

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Chewy White Chocolate Cranberry Bars

Add a comment

Recipe Rating


    • tweenselmom
    • 5 stars

    My kids will totally enjoy these, they love cookies and weekends are about cookies in our family.

    • Rosey

    Blondies are always good. They are perfect for the upcoming holiday festivities.

    • berlin

    always love preparing yummy treats for my family. i always find it satisfying to see them full and happy with what they are munching.

      • chewoutloud

      I feel the same with my boys! And they sure don’t complain 😉 🙂

    • Kuntala Bhattacharya
    • 5 stars

    Chewie bars with M&M , wow, simply amazing. The recipe looks great and yummy. Good one for snacks, interesting

    • WanderlustBeautyDreams

    This looks so good and it’s making me hungry! I need to try this recipe.

    • Chad

    oh yessssss!!! This looks so delicious! Although i am trying to watch my diet, I can’t help but trying out this recipe, yumm…

    • Hannah Marie

    This is my type of cookie. Must be perfect with a cup of black coffee. I am definitely trying this.

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