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Kit Kat Cookies

Kit Kat Cookies are a thick vanilla and chocolate swirled cookie recipe loaded with crunchy chopped Kit Kat Bars!

Why You’ll Love These Kit Kat Cookies

  • Kit Kats! Kit Kat Bars are the perfect combo of chocolate and vanilla, and the result in these cookies is PERFECTION! They add a bit of a crunch which paired with the buttery, chocolate marbled cookie is a texture and flavor dream. And who doesn’t LOVE Kit Kats?
  • Easy To Make! Despite thse cookies looking like they are straight from a bakery, they are extra easy to make! The prep time is only about 15 minutes and they bake for 10, so you can have cookies in under 30 minutes.
  • Impress Your Guests! When I had the idea for these Kit Kat Cookies to swirl melted chocolate right into the cookie dough to create pretty ribbons of chocolate throughout the vanilla cookie, I didn’t expect for them to turn out as PRETTY as they did!
Kit Kat cookies stacked on a wire rack with the top cookie broken in half showing the vanilla and chocolate swirl.

Ingredients / What You Will Need

Make sure to scroll down to the recipe card at the bottom of the post for the full recipe with the ingredients and instructions!

  • Butter. I use salted butter in this recipe because that’s my personal preference, but you can absolutely use unsalted butter if you prefer. No need to increase any additional salt.
  • Sugars: I use a combination of both light brown sugar and granulated sugar in this cookie recipe.
  • Egg: This recipe calls for 1 whole large egg AND an additional egg yolk. Save that extra white for an omelette!
  • Vanilla extract. You can also ise vanilla bean paste.
  • Dry Ingredients: Kosher salt, baking soda, and all purpose flour
  • Kit Kat Candy. You’re going to chop up the Kit Kat bars and mix them right into the cookie dough. I like to chop up some extras to press into the cookies when they’re baked to give them that bakery look!
  • Melted chocolate. The unique thing about this recipe is you swirl melted chocolate right into the cookie dough which gives it a marbled look. Just make sure not to over-mix it when you add the chocolate or you won’t get those pretty ribbons throughout! You can use either milk chocolate or semi-sweet chocolate. I prefer semi-sweet as it adds more flavor!
Baked Kit Kat Cookies cooling on a wire rack

How To Make Kit Kat Cookies

The idea behind this thick, soft cookie recipe is that the base would be a buttery cookie dough, a lot like a chocolate chip cookie, with melted chocolate swirled all through the dough!

  • Start by making the cookie dough. This is a fairly straight-forward cookie recipe that requires you to use a stand mixer or a hand-held electric mixer.
  • Swirl in the melted chocolate: Simply melt some chocolate chips, or chopped chocolate in the microwave or on the stove top and drizzle that into the cookie dough.
  • Using the handle of a wooden spoon swirl the chocolate into the dough create ribbons of chocoalte throughout. Try not to over-mix it because you really want to see the swirls!
  • Use a large cookie scoop to drop the dough onto a parchment lined baking sheet, allowing them room to spread as they bake.
  • Once they’re baked you can press any extra chopped Kit Kats into the tops to look pretty and give a little crunch!
A close up of a Kit Kat cookie that is marbled chocolate and vanilla with pieces of chopped Kitkat candies.

Do You Have To Use Kit Kat?

If for some crazy reason Kit Kats aren’t your favorite you can really sub in any chopped candy in their place! Get as creative as you would like. Here are some great options:

  • Peanut Butter Cups
  • Snickers
  • Twix
  • M&Ms

More Candy Filled Cookie Recipes

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A close up of a Kit Kat cookie that is marbled chocolate and vanilla with pieces of chopped Kitkat candies.

Kit Kat Cookies

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  • Author: Shelly
  • Prep Time: 12 minutes
  • Cook Time: 10 minutes
  • Total Time: 22 minutes
  • Yield: 24 cookies 1x
  • Category: Cookies
  • Method: Oven
  • Cuisine: Dessert


A candy lovers dream cookie, these marbled cookies are swirled with ribbons of melted chocolate and loaded with chopped Kit Kat bars.


  • 3/4 cup unsalted butter, room temperature
  • 3/4 cup light brown sugar
  • 1/4 cup granulated sugar
  • 1 egg, plus 1 egg yolk
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon baking soda
  • 1 teaspoon kosher salt
  • 2 cups all-purpose flour
  • 1 1/2 cups (8- ounce) coarsely chopped Kit Kat bars, plus more for garnish
  • 3/4 cup chopped chocolate or chocolate chips, melted


  1. Preheat the oven to 350°F. Line a baking sheet with parchment paper and set aside.
  2. In the bowl of your stand mixer fitted with a paddle attachment mix butter and both sugars together on medium speed for 2 minutes.
  3. Add in the whole egg, egg yolk, vanilla, baking soda, and salt and mix for 1 minute until smooth, scraping sides of bowl as necessary.
  4. Turn the mixer to low and add in the flour, mixing until just combined.
  5. Stir in chopped Kit Kat bars evenly.
  6. Remove the bowl from the mixer and drizzle in the melted chocolate. Using the back of a wooden spoon, swirl the melted chocolate throughout the cookie dough, making sure to leave ribbons of chocolate.
  7. Using a large (3- tablespoon sized) cookie scoop, drop the dough 2- inches apart onto the prepared baking sheet.
  8. Bake for 9-10 minutes, or  until the edges are lightly golden.
  9. If desired, immediately press extra chopped Kit Kat bars onto warm cookies.
  10. Transfer to a wire rack to cool completely.


Store airtight for up to 5 days for best freshness.

Freeze airtight for up to 2 months. Thaw at room temperature.

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