Cornflake Marshmallow M&M Christmas Cookies

These are about to become your new FAVORITE Christmas Cookie! They are the perfect combination of a soft cookie with a fun little crunch!
Course Dessert
Cuisine Baking
Keyword christmas cookies, Cornflake Christmas cookies, Cornflake Marshmallow Cookies, m&m christmas cookies
Prep Time 15 minutes
Cook Time 12 minutes
Chill Time 45 minutes
Total Time 1 hour 12 minutes
Servings 24
Calories 212kcal
Author Pretty Providence


  • 1 cup butter room temperature
  • 1 1/4 cup sugar
  • 2/3 cup packed brown sugar
  • 1 egg
  • 1/2 tsp vanilla extract
  • 2 cups flour
  • 1/2 tsp baking powder
  • 1/4 tsp baking soda
  • 1 1/2 tsp salt
  • 3 cups frosted flakes cereal
  • 1 cup red and green mini m&m's
  • 1 cup mini marshmallows


  • Combine the butter and sugars in a stand mixer with a paddle attachment, cream together on medium-high for 2 to 3 minutes. Scrape the sides of the bowl, add the egg and vanilla, and beat for 7 to 8 minutes.
  • Reduce the mixer speed to low and add the flour, baking powder, baking soda, and salt. Mix just until the dough comes together - no longer than a minute.
  • On low speed, paddle in the frosted flakes and mini m&m's until they’re incorporated.
  • Divide dough into 1/4 c. balls, stuff with 2 or 3 mini marshmallows, and place balls on a parchment-lined cookie sheet. Refrigerate for at least an hour, or place in freezer for 30-45 minutes. (They must be chilled!)
  • Heat the oven to 365°f
  • Re-arrange the dough balls minimum 4 inches apart on parchment- or silpat-lined cookie sheet and bake for 11-16 minutes (check the cookies at 11 minutes, mine took 12!) The cookies will puff, crackle, and spread.
  • Cool the cookies completely on cookie sheets before transferring to a plate. Store in airtight containe, if you have any left to store.


Store in an airtight container. 


Calories: 212kcal | Carbohydrates: 29g | Protein: 2g | Fat: 10g | Saturated Fat: 6g | Cholesterol: 28mg | Sodium: 262mg | Potassium: 32mg | Fiber: 1g | Sugar: 17g | Vitamin A: 330IU | Vitamin C: 0.8mg | Calcium: 19mg | Iron: 1.6mg