These peanut butter M&M cookies are soft, chewy, and made with classic pantry ingredients for a perfectly balanced bite. After a complete recipe overhaul and plenty of retesting, this version delivers rich peanut butter flavor with pops of chocolate and crunch in every cookie.
½cupclassic creamy peanut buttersuch as Jif, Skippy, etc.
½cupunsalted buttersoftened
½cuppacked light brown sugar
⅓cupgranulated sugar
2teaspoonsmolasses
1large egg
1large egg yolk
1 ½teaspoonpure vanilla extract
1 ½cups(187.5g) all-purpose flour
½teaspoonsalt
½teaspoonbaking soda
1 ½cupsM&Ms, dividedor M&Ms and chocolate chips, plus more for topping if desired
Instructions
Preheat the oven to 350°F (175°C) and line two large baking sheets with parchment paper.
In a large bowl, beat together the peanut butter, butter, brown sugar, and granulated sugar for about 2 minutes, until smooth and creamy.
Mix in the molasses, egg, egg yolk, and vanilla extract. Beat for another minute, until the mixture is light and fluffy.
In a separate small bowl, whisk together the flour, salt, and baking soda.
With the mixer running on low speed, gradually add the flour mixture to the wet ingredients, mixing just until combined.
Gently stir in 1 ¼ cups of the M&Ms (and chocolate chips, if using).
Scoop the dough into 1½-tablespoon portions and place them on the prepared baking sheets, leaving about 2 inches between each cookie. Press a few extra M&Ms onto the tops of the balls.
Bake for 10–12 minutes, or until the bottoms and edges are just set and lightly golden.
Let the cookies cool on the baking sheets for 5–10 minutes, then transfer to a wire rack to cool completely or until just warm. Enjoy!
Notes
Recipe Pro-Tips
Use classic creamy peanut butter. Brands like Jif or Skippy create the best texture and structure; natural peanut butter can make the cookies greasy or crumbly.
Press extra M&Ms on top before baking. Gently pressing a few M&Ms into each dough ball creates a prettier, bakery-style finish with visible pops of color.
Boost the peanut butter flavor if desired. Swap regular M&Ms for peanut butter M&Ms for a richer peanut butter bite without changing the base dough.
Don’t overbake. Pull the cookies when the edges are just set and lightly golden — they’ll continue to firm up as they cool and stay soft in the center.
Gluten-free works with a quick chill. Use a 1:1 gluten-free all-purpose flour, then chill the dough (covered) in the refrigerator for 1 hour before scooping and baking. Let the cookies cool completely to room temperature before enjoying for the best texture.
Storage Directions
Storing: Store cooled cookies in an airtight container at room temperature for up to 4 days.
Freezing: Once fully cooled, freeze baked cookies in a freezer-safe container for up to 3 months. Thaw at room temperature before serving.
Freezing cookie dough: Scoop the dough into balls and freeze on a baking sheet until solid, then transfer to a freezer-safe bag or container for up to 3 months. Bake directly from frozen, adding 1–2 minutes to the bake time.