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Soft Chewy M&M Cookies

Prep Time 2 hours 15 minutes
Cook Time 12 minutes
Servings 30 cookies

Ingredients

  • 2 ⅓ cups flour
  • 1 tsp cornstarch
  • 1 tsp baking soda
  • ½ tsp salt
  • ¾ cup unsalted butter softened
  • ¾ cup light or dark brown sugar
  • ½ cup granulated sugar
  • 1 large egg
  • 1 egg yolk
  • 1½ tsp pure vanilla extract
  • 1 cup mini M&Ms (plus 2 tbsp for topping, optional)

Instructions

  1. Whisk the flour, cornstarch, baking soda, and salt together in a medium bowl. Set aside.

  2. In large bowl using a hand-held mixer or stand mixer fitted with a paddle attachment, beat softened butter for about 1 minute on medium speed until creamy. Add the brown sugar and granulated sugar, then beat on medium-high speed until creamy and combined. Scrape down the sides and bottom of the bowl as needed. Beat in egg, egg yolk, and vanilla extract. Scrape down the sides and bottom of the bowl as needed. With the mixer running on low speed, slowly add dry ingredients to wet ingredients. Pour in 1 cup M&Ms and beat on low speed for 20 seconds or until combined. Once completely combined, scoop out into 1 ½" thick balls and chill in the refrigerator for 2 hours.

  3. Preheat oven to 350°F (177°C). Line baking sheets with parchment paper or silicone baking mats. Set aside.

  4. Flatten and arrange 3 inches apart on the baking sheets. Bake for 7-9 minutes or until lightly browned on the sides.

  5. Remove from the oven and allow cookies to cool on the baking sheet for 2 minutes before transferring to a wire rack to cool completely. While the cookies are still warm, press the remaining 2 tbsp of M&Ms into the tops of the cookies.

Recipe Notes

Soft and chewy: 7 minutes, cool on baking sheet for 3 minutes. Remove with non stick spatula (they will still be soft) cool completely. 
Medium soft with crisp edges: 9 minutes, cool on baking sheet for 2 minutes. Cool completely. As pictured.
Firm chew with crispy edge: 10 minutes, cool on baking sheet for 2 minutes. Cool completely.
 
Cookies stay fresh covered at room temperature for up to 1 week.