• prep: 2 hr 15 min
• cook: 12 min
• total: 2 hr 27 min

servings:

These rainbow M&M cookies are soft-baked style with extra chewy edges. I recommend mini M&Ms so you can pack more into each cookie. Chilling the cookie dough for 2 hours is an imperative step, so make sure you set aside enough time.

• 2 cups + 2 Tablespoons (265g) all-purpose flour (spoon & leveled)
• 1 teaspoon cornstarch
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 cup (1.5 sticks or 170g) unsalted butter, softened to room temperature
• 3/4 cup (150g) packed light or dark brown sugar
• 1/2 cup (100g) granulated sugar
• 1 large egg + 1 egg yolk, at room temperature
• 1 and 1/2 teaspoons pure vanilla extract
• 1 cup mini M&Ms (plus 2 Tablespoons for topping, optional)

Click Here For Step-By-Step Instructions