One-Bowl M&M Cookie Bars – Soft, Sweet, and Simple
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Need a dessert that pleases kids and grown-ups alike? These Soft M&M Cookie Bars are exactly what you’re looking for. Imagine the flavor of your favorite chocolate chip cookies with the added joy of crunchy, colorful M&Ms—all baked into chewy, thick bars you can slice and serve. Whether it’s a potluck, party, or weekday craving, this one-bowl recipe is your sweet solution.
Why I Love This Recipe
- Soft and chewy texture that stays fresh for days
- No chilling required—bake straight from the bowl
- One pan = less cleanup
- Customizable mix-ins for any occasion
- Kid-friendly and freezer-friendly
Ingredients 🛒
- 1 cup (2 sticks) unsalted butter, melted
- 1 cup granulated sugar
- 1/2 cup packed light brown sugar
- 2 large eggs, room temperature
- 2 teaspoons vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1 cup semi-sweet chocolate chips
- 1 cup M&Ms (plus extra for topping)
Ingredient Notes & Swaps
- Butter: Melted butter helps make the bars ultra-moist
- Brown sugar: Adds a subtle caramel richness—don’t skip it!
- Flour: Stick with all-purpose for the best structure
- M&Ms: Swap for peanut butter chips, toffee bits, or chopped mini candy bars
- Chocolate chips: Use milk, dark, or even white chocolate if preferred
One-Bowl M&M Cookie Bars – Soft, Sweet, and Simple
Need a dessert that pleases kids and grown-ups alike? These
Prep: min | Cook: min | Total: min
Servings:
Ingredients
- 1 cup (2 sticks) unsalted butter, melted
- 1 cup granulated sugar
- 1/2 cup packed light brown sugar
- 2 large eggs, room temperature
- 2 teaspoons vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1 cup semi-sweet chocolate chips
- 1 cup M&Ms (plus extra for topping)
Instructions
- Preheat & Prepare: Preheat oven to 350°F (175°C). Line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy lifting. Lightly grease the paper and set aside.
- Mix Wet Ingredients: In a large mixing bowl, whisk together melted butter, granulated sugar, and brown sugar until smooth. Add eggs one at a time, whisking well after each addition. Stir in vanilla extract.
- Add Dry Ingredients: In a separate bowl, whisk together flour, baking powder, and salt. Gradually stir the dry mixture into the wet ingredients until just combined—do not overmix.
- Fold in the Good Stuff: Gently fold in chocolate chips and M&Ms. The dough will be thick and slightly sticky.
- Press & Decorate: Spread the dough evenly into your prepared pan. Press extra M&Ms on top for that bakery-style look.
- Bake: Bake for 22–25 minutes, or until the edges are golden brown and the center is set. A toothpick inserted should come out with a few moist crumbs.
- Cool & Cut: Let cool in the pan completely. Lift out using parchment overhang and cut into squares or rectangles.
Nutrition
- Calories:
- Fat:
- Carbs:
- Protein:
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Instructions 👩🍳
1. Preheat & Prepare
Preheat oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper, leaving an overhang for easy lifting. Lightly grease the paper and set aside.
2. Mix Wet Ingredients
In a large mixing bowl, whisk together melted butter, granulated sugar, and brown sugar until smooth. Add eggs one at a time, whisking well after each addition. Stir in vanilla extract.
3. Add Dry Ingredients
In a separate bowl, whisk together flour, baking powder, and salt. Gradually stir the dry mixture into the wet ingredients until just combined—do not overmix.
4. Fold in the Good Stuff
Gently fold in chocolate chips and M&Ms. The dough will be thick and slightly sticky.
5. Press & Decorate
Spread the dough evenly into your prepared pan. Press extra M&Ms on top for that bakery-style look.
6. Bake
Bake for 22–25 minutes, or until the edges are golden brown and the center is set. A toothpick inserted should come out with a few moist crumbs.
7. Cool & Cut
Let cool in the pan completely. Lift out using parchment overhang and cut into squares or rectangles.
Tips for Success 💡
- Don’t overbake! They’ll continue to set as they cool
- Press extra M&Ms on top right before baking for the prettiest finish
- For cleaner cuts, chill the bars slightly before slicing
- Double the recipe and use a sheet pan for parties
Pair These With…
These vibrant treats go great with cold milk or a fun dessert drink like:
- Rainbow Sprinkle Cookies
- Chocolate Chip Cookie Bites
- Old-School No-Bake Cookies
- Copycat Neiman Marcus Cookies
- Caramel Apple Pie Cookies
Storage & Make-Ahead
- Room temperature: Store in an airtight container for up to 5 days
- Freezer: Freeze cut bars in a zip-top bag for up to 2 months
- Make ahead: Dough can be refrigerated for 24 hours and baked when ready
Final Thoughts
These Soft M&M Cookie Bars strike the perfect balance between chewy, buttery, and chocolate-packed. They’re the kind of bake that never disappoints—especially when you need something easy, colorful, and impossible to resist.
Tried them? Tag us @chefmaniac or drop a comment below! We love seeing your bakes 🍪❤️
