Cornflake Marshmallow Chocolate Chip Cookies

Back in 2010, I spent a whirlwind winter weekend in NYC. I don’t remember many details about that trip—but I do know it was the first time I went to Milk Bar.

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Christina Tosi’s Milk Bar is a NYC institution. Tosi is famous for her treats like Cornflake Cookies, Cereal Milk Soft Serve and naked Birthday Cakes. I’d heard rave reviews from friends who lived in NYC, and couldn’t wait to try it for myself. So we ordered a lot: some soft serve, a couple cookies and a truffle on the side. Everything was great, but the cookies stood out the most. Over the years, I tried more flavors whenever I happened to pass by a Milk Bar. And then I found this recipe, and decided to recreate the Milk Bar goodness for myself.
These Cornflake Marshmallow Chocolate Chip Cookies are truly something else. My
 tasters compared them to a caramelized Rice Krispie treat—but better! They’re salty but sweet, chewy but crunchy…and highly addicting.
I used an adapted recipe from Butter with a Side of Bread, and my cookies turned out great. Note that they spread a lot while baking, so make sure to allow space on your cookie sheet!

Cornflake Marshmallow Chocolate Chip Cookies

Original recipe: Butter with a Side of Bread I’ve rewritten things a bit and added commentary. 

Yield: ~36 cookies

Suggested equipment: Mixer

Total Time: 3.5 hours, including chill time

Cook Time: ~15 minutes

Ingredients

Cornflake crunch

  • 5 cups cornflake cereal
  • 1/2 cup milk powder (I got mine from Bob’s Red Mill)
  • 3 tbsp sugar
  • 1 tsp salt
  • 9 tbsp butter, melted

Cookies

  • 1 cup butter, at room temperature
  • 1 1/4 cup granulated sugar
  • 2/3 cup brown sugar, packed
  • 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 cornflake crunch
  • 1 cup mini chocolate chips
  • 1 cup mini marshmallows

Instructions

Make your cornflake crunch

  1. Preheat your oven to 275F
  2. Pour your cornflakes into a medium bowl, then use a cup to crush them into bits
  3. Add the milk powder, sugar and salt
  4. Toss the whole mixture
  5. Add your melted butter, and toss the mixture again. As you mix, you’ll bind the ingredients together into little clusters
  6. Line a cookie sheet with parchment, and spread your cornflake clusters onto the pan
  7.  Bake for 15-20 minutes. Start checking around 15 to see how things look—you don’t want burnt clusters! When they’re ready, they’ll smell buttery and look toasted. They’ll get a bit chewier as they cool
  8. Let the crunch cool completely before you use it in your cookies. You can make the crunch ahead of time, too. It will stay fresh at room temp for about a week, and will last about a month if you put it in the freezer or fridge.

Make your dough

  1. Use a mixer to cream your butter, sugar and brown sugar. Use the medium-high setting for about 2-3 minutes
  2. Scrape your bowl, then add in the egg and vanilla. Beat again, 7-8 minutes
  3. Turn down your mixer to low. Add in the flour, baking powder, baking soda and salt. Mix only until it comes together as a dough—should be about a minute
  4. Stir in your cornflake crunch and mini chocolate chips by hand
  5. Portion your dough into 1/4 cup balls
  6. Flatten each dough ball, and place 2 mini marshmallows in the middle.
  7. Refrigerate your dough balls for at least an hour. This keeps the dough from spreading, so don’t skip this step!

Bake your cookies

  1. Preheat your oven to 365F
  2. Line a cookie sheet with parchment paper
  3. Place your dough balls at least 4 inches apart on the cookie sheet
  4. Bake your cookies 11-16 minutes. Mine took 13. You’ll know they’re done when the cookies are puffed, crackled and spread out
  5. Cool completely before serving. These will keep well for a few days in an airtight container

 

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