30-Minute Chewy Oatmeal M&M Cookies

Prep: 15 minCook: 10 min24 cookiesmediumAmerican
Chewy Oatmeal M&M Cookies with Brown Sugar and Cinnamon

These soft and chewy oatmeal cookies combine the hearty texture of old-fashioned oats with colorful M&M candies for a delightful treat that appeals to both kids and adults. The brown sugar adds moisture and rich caramel notes, while cinnamon provides warm spice that complements the chocolate candies. Perfect for lunchboxes, bake sales, or afternoon snacks, these cookies strike an ideal balance between wholesome oats and indulgent candy. The combination of butter and brown sugar creates a tender crumb that stays soft for days.

Ingredients

Yield: 24 cookies
  • 1 cup butter, softened
    coconut oil1:1Use solid coconut oil for best texturedairy-free

    medium

    Full guide →
  • 1 cup brown sugar, packed
  • ½ cup granulated sugar
  • 2 large eggs
  • 1 tsp vanilla extract
  • 1 ½ cups all-purpose flour
    whole wheat flour3/4:1Reduces amount slightly for lighter texture

    medium

  • 1 tsp baking soda
  • 1 tsp ground cinnamon
  • 3 cups old-fashioned oats
  • 1 ½ cups M&Ms
    chocolate chips1:1Use same amount for classic chocolate flavor

    high

Instructions

  1. 1

    Preheat oven to 350°F and line baking sheet with parchment paper

  2. 2

    Cream together butter, brown sugar, and granulated sugar until light and fluffy

  3. 3

    Beat in eggs one at a time, then stir in vanilla extract

  4. 4

    Whisk together flour, baking soda, and cinnamon in separate bowl

  5. 5

    Gradually add dry ingredients to wet ingredients, mixing until just combined

  6. 6

    Stir in oats and M&Ms

  7. 7

    Drop by rounded tablespoonfuls onto prepared baking sheet

  8. 8

    Bake for 10-12 minutes until edges are golden brown

  9. 9

    Cool on baking sheet for few minutes before transferring to cooling rack

Tips

Tip 1

Don't overbake - cookies will continue cooking on hot pan after removal from oven for perfect chewy texture

Tip 2

Let butter soften at room temperature for easier creaming, or cut into small pieces to speed the process

Tip 3

Space cookies 2 inches apart on baking sheet as they will spread during baking

Good to Know

Storage

Store in airtight container at room temperature for up to 1 week

Make Ahead

Dough can be prepared and refrigerated for up to 3 days or frozen for up to 3 months

Serve With

Serve at room temperature with cold milk or coffee

Common Mistakes

Watch

Don't overmix after adding flour to avoid tough cookies

Watch

Remove from oven when edges are set but centers still look slightly underbaked

Substitutions

Dairy-Free Swaps

butter
coconut oil1:1Use solid coconut oil for best texturedairy-free

medium

Full guide →

General Alternatives

M&Ms
chocolate chips1:1Use same amount for classic chocolate flavor

high

Full guide →
all-purpose flour
whole wheat flour3/4:1Reduces amount slightly for lighter texture

medium

Full guide →
Find more substitutions →

FAQ

Can I use quick oats instead of old-fashioned oats?

Old-fashioned oats provide better texture and chewiness, but quick oats will work in a pinch though cookies may be less hearty.

How long do these cookies keep fresh?

Store in airtight container for up to one week at room temperature, or freeze baked cookies for up to 3 months.

Can I freeze the cookie dough?

Yes, scoop dough onto baking sheets, freeze until solid, then transfer to freezer bags for up to 3 months. Bake directly from frozen, adding 1-2 minutes.