Cornflake Marshmallow Chocolate Chip Cookies are over-the-top phenomenal Milk Bar cookies that combine sweet and salty ingredients into one amazing cookie recipe.

Milk Bar Cornflake Marshmallow Chocolate Chip Cookies are gooey, crunchy, sweet, and salty cookies.

I couldn’t tell you the last time I bought cornflakes but there was something about these cornflake marshmallow chocolate chip cookies that completely hooked me. It probably had a bit to do with the fact that this is another Milk Bar recipe, which I tend to love so dearly.

But while the name itself is quite a mouthful, but I guess it’s sort of fitting considering I couldn’t keep these cookies out of my mouth. Ha!

One might think that you just mix some cereal into a cookie batter and call it a day but these cookies, as trashy as they do sound, are a bit more “high end” than that. 

With the cornflakes, you’ll first make what likens to a big crumbly bunch of slightly salty cornflake crack that you’ll mix into marshmallow chocolate chip dough. And let me tell you, keep that stuff at a distance while you make the dough because it’s impossible to resist snacking on! 

That mix of sweet and salty gets me every.single.time.  Like with these salted caramel brownies and these salted caramel cupcakes.

Milk Bar Cornflake Marshmallow Chocolate Chip Cookies on a cookie sheet ready to be baked.

The cookies bake up with crunchy edges, soft centers, and gooey marshmallows running amok throughout. 

And they are big cookies – not as monstrous as my s’mores stuffed chocolate chip cookies however – but I felt like they baked better from the freezer than they did from the fridge, as the recipe instructs, in that the marshmallows weren’t so apt to run all over the cookie sheet. 

So don’t be afraid to flash-freeze the portioned dough and bake them off later – you’ll thank me when you find the extras weeks later during a must-have-something-sweet freezer raid.

More Milk Bar Recipes for You to Fall in Love With

The genius behind Milk Bar’s recipes, Christina Tosi, has her finger on the pulse of odd-ish sounding recipes that always turn out to be amazing. I’ve made these Compost Cookies with ground coffee and potato chips to rave reviews. 

The outrageous Fudgy Brownie Pie was another Milk Bar creation. And my favorite birthday cake ever, the Milk Bar Birthday Layer Cake, is probably the most classic Milk Bar recipe you can make at home outside of the famed Crack Pie.

Milk Bar Cornflake Marshmallow Chocolate Chip Cookies are gooey, crunchy, sweet, and salty cookies.

Cornflake Marshmallow Chocolate Chip Cookies

Yield: about 1 ½ dozen large cookies
Prep Time: 20 minutes
Freezing Time: 1 hour
Bake Time: 45 minutes
Total Time: 2 hours 5 minutes

Cornflake marshmallow chocolate chip cookies that hail from the famed Momofuku Milk Bar in NYC. These Milk Bar cookies are another fabulous cookie recipe that combine sweet and salty in one amazing dessert!


For the cornflake crunch:

  • 5 cups cornflakes
  • ½ cup milk powder (regular, malted, or diastolic)
  • 3 tbsp granulated sugar
  • 1 tsp Kosher salt
  • 9 tbsp unsalted butter, melted

For the cookies:

  • 16 tbsp unsalted butter, at room temperature
  • 1 ¼ cups granulated sugar
  • ⅔ cup light brown sugar
  • 1 egg
  • ½ tsp vanilla extract
  • 1 ½ cups all-purpose flour
  • ½ tsp baking powder
  • ¼ tsp baking soda
  • 1 tsp Kosher salt
  • 3 cups (about ¾ of the full recipe) Cornflake Crunch
  • ⅔ cup mini chocolate chips
  • 1 ¼ cups mini marshmallows


  1. To make the cornflake crunch: Preheat oven to 275° F and line a large baking sheet with parchment paper.
  2. Add the cornflakes to a very large bowl and crush them up with your hands until they are about the size of small peas. Stir in the milk powder and salt and then the melted butter, stirring everything together until well-combined. You should have small clusters. Spread the cornflake clusters out on the baking sheet in one even layer. Bake for 20-25 minutes, stirring once, until they are toasty and golden brown. The clusters will crisp as they cool. Cool the cornflake crunch to room temperature on a wire rack before adding to the batter.
  3. To make the cookies: Cream the butter and sugars at medium-high speed in the bowl of a stand mixer until light and fluffy, about 2-3 minutes. Add the egg and vanilla and continue beating for 7-8 minutes. Reduce the speed to low and add the flour, baking powder, baking soda, and salt, stirring just until the dry ingredients are incorporated. With the mixture on low, stir in the cornflake crunch, chocolate chips, and marshmallows.
  4. Line two baking sheets with parchment paper. With a large cookie/ice cream scoop, portion out 1/3 cup rounds of dough onto the sheets. Lightly flatten the rounds into discs with your fingers (see photo above). If you have extra cornflake crunch, feel free to sprinkle on a little extra over the discs. Wrap the baking sheets with plastic wrap and refrigerate for at least 1 hour before baking. You can also flash-free the dough at this point - freeze completely on the baking sheet and store the frozen dough in plastic zip-top bags for up to 1 month in the freezer.
  5. When you're ready to bake, preheat the oven to 375° F. Space the dough 4 inches apart on the baking sheets and bake for 12-16 minutes, until the cookies are light brown and turn puffy in the centers - they will spread as they bake. Transfer the sheets to a wire rack to cool for 10-15 minutes before transferring the cookies to the racks to cool completely. Cookies will keep for 2-3 days at room temperature in an airtight container.

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Leave a Comment

  • Warm Vanilla Sugar
    April 9, 2014 at 10:12 AM

    These cookies sound so yummy!! LOVE the recipe!

  • Kayle (The Cooking Actress)
    April 9, 2014 at 6:01 PM

    awww hey! look! a link to me! lol–these are seriously SOOO good-and yours clearly turned out so much better than mine! I am really craving that cornflake crunch now…SO ADDICTIIIIVE

  • Josie
    April 9, 2014 at 9:14 PM

    Yessssss! These cookies are so amazing. And I agree that they were better from the freezer than the fridge. I need to revisit this cookbook and make all the things!!

    • taraliptak
      April 17, 2014 at 10:47 AM

      I can’t believe I took so long to make them. The cornflake crack – omg! It totally made this cookie so amazing!

  • Carol at Wild Goose Tea
    April 12, 2014 at 2:32 PM

    A trashy cookie???? There is NO such thing. Just like there are not too many shoes or particularly in my case too many earrings. I will admit as much as I bake cookies, I don’t think I have seen one using mini marshmallows. Soooo I am going to have to give this a try. They certainly look good.

  • April 12, 2014 at 7:56 PM

    Wow. I don’t think I would have ever thought of this combo! This sounds SO good!

    • taraliptak
      April 17, 2014 at 10:35 AM

      I know, right? So different! They are really awesome!