Kit Kat Cookie Bars

Name: Kit Kat Cookie Bars
Prep time: 10 min
Cook time: 55 min
Total time: 65 min
Ingredients: 1 ¾ cups all-purpose flour; ½ teaspoon baking powder; 3/4 cup salted butter (softened or 1 1/2sticks); 1 ½ cups granulated sugar; 2 large eggs (lightly beaten); 2 teaspoons vanilla extract; 4 45- gram Kit Kat packs (or 15 12-gram treat-sized, roughly chopped); Cooking Spray

Jump to Recipe Jump to Video Print Recipe

Kit Kat Cookie Bars are mouth-watering, soft, chewy, easy to make treats, perfect for satisfying your sweet tooth and impressing your friends and family.

If you're a fan of the popular Kit Kat chocolate bar, you're in for something special! By adding this candy into soft, chewy cookie bars, you can experience the magic of Kit Kats in a whole new way. So, if you're ready to dive into the world of Kit Kat-infused baking let's get started!

Closeup of three cookie bars on top of each other.

This was inspired by my carrot cake bars, no bake peanut butter bars and chunky monkey bars on this site, and pairs well with this amazing collection of hot chocolate recipes.

Why You Will Love This Recipe

These Kit Kat Cookie Bars are incredibly easy to make and budget-friendly.
You'll love the crunchy Kit Kats and the soft, chewy cookie dough.
These impressive, crowd pleasing treats are perfect for parties, picnics, or a snack to satisfy a craving.

Ingredients

To create mouthwatering Kit Kat Cookie Bars, you'll need a few staple ingredients in your kitchen and here's a list.

All-Purpose Flour - The foundation of your cookie bars, all-purpose flour works well in this recipe.
Baking Powder - Contributes to a lighter, airy texture.
Salted Butter - This provides the delicious indulgent taste and moistness that we all love in baked goods.
Granulated Sugar - You can also use dark brown sugar, light brown sugar or a combination. Brown sugars will add a deeper, richer taste, and more chewiness from the molasses found in brown sugars.
Large Eggs - These act as a binding agent, giving the cookie bars structure.
Vanilla Extract - Vanilla is a universal crowd-pleaser, but feel free add almond or mint instead for different flavor.
Kit Kat Chocolate Bars - Consider adding a different treat like peanut butter cups, M&M's, Turtles, Butterfinger, Snickers, Oh Henry, or your favorite, instead of or in combination.

See the recipe card below for the exact quantities of each ingredient.

Substitutions and Variations

Don't be afraid to get creative with your Kit Kat Cookie Bars! You can add extra flavors and textures by incorporating some of the following ingredients:

Go Nuts - Add your favorite chopped nuts like peanuts, hazelnuts, almonds, pecans, or walnuts to give your bars added crunch.
Add Chips: Add semi-sweet chocolate, white chocolate, butterscotch, caramel, peanut butter chips or a combination inside your bars for more flavor.
Salt: A pinch of salt enhances the overall taste of the cookie bars or sprinkle some sea salt on top of the bars for a sweet-salty addition.
Add a Drizzle: Consider drizzling your cookie bars with melted chocolate, chocolate sauce, caramel sauce or caramel.

Instructions

These bars could not be easier to make.

Dry ingredients blended together in white bowl using whisk.

Line an 8x8 pan with parchment paper to leave at least 2 sides long to make it easy to remove later. Whisk together all-purpose flour and baking powder and set aside.

Cream together softened butter and sugar in a stand mixer for about 5 minutes on low, with either the paddle attachment or dough hook.

Remaining wet ingredients added to butter mixture.

All wet ingredients blended into butter.

Pour in lightly beaten eggs, just enough to break the yolks, and vanilla and run the machine on low for 1 minute.

Dry ingredients added to butter mixture.

Add in dry ingredients and run again for about 2 minutes to thoroughly mix.

Spatula blending Kit Kat bars into dough.

Add in chopped kit kat bars and mix with a spoon or spatula. Mixing in half at a time will help to make sure they are evenly distributed.

The dough will be sticky. Drop dollops around the prepared 8x8 pan and use an offset spatula or the back of a spoon to smooth out.
Bake for 50-55 minutes, or until a toothpick comes up clean but with some moist crumbs from the center of the pan.

Cool on a wire rack fully before taking cookies out of the pan.

Hint: Hang on to a few Kit Kat pieces or have additional on hand and drop and press as needed into empty areas of dough before baking.

If you love recipes like this, you may also enjoy our eggnog cookie bars, magic cookie bars or cake mix cookie bars.

Three cookie bars piled on top of each other surrounded by others.

Storage

Here are some useful tips on how to keep these delicious for as long as you need.

These cooled bars can be stored at room temperature, out of direct sunlight, in an airtight container, or covered with plastic wrap or aluminum foil, for up to three days, including the day you made them. To help them stay fresh longer you can also include a small piece of white bread inside the container to absorb any excess moisture.

Freezer:

Wrap individual bars in plastic wrap or aluminum foil, then place them in an airtight container or a resealable freezer bag for up to 3 months. When ready to enjoy leave on counter for about 30 to 45 minutes.

Make Ahead:

Yes, you can prepare the dough in advance and refrigerate for up to 24 hours or freeze for up to three months. Make sure to allow dough come to room temperature before baking.

These Kit Kat cookie bars are perfect served on a dessert tray with any of these brown sugar dessert recipes or potluck dessert recipes.

Tips

By following these tips, your Kit Kat Cookie Bars will be a delicious and satisfying treat.

To ensure even distribution of KitKat chocolate bar pieces inside your cookie bars, chop your Kit Kats into similarly sized pieces.
To avoid having your cookie bars stick to the pan, line your baking dish with parchment paper and cooking spray which also makes clean-up super easy.
Overmixing your dough can cause your cookie bars to be dense and tough so as soon as your dough is blended, stop mixing and gently fold in the Kit Kat pieces.
Keep an eye on your cookie bars to avoid over-baking and insert toothpick in center until it comes out basically clean with maybe a few crumbs.

FAQ

Do you have questions about Kit Kat cookie bars? Here are some of the most commonly asked questions about them.

Can I use different flavors of Kit Kat Bars?

Definitely! Feel free to experiment with different flavors of Kit Kat bars, such as mint, dark chocolate, or white chocolate, to create a unique and personalized dessert.

Why are there so many Kit Kat flavors in Japan?

There are over 300 different Kit Kat flavors in Japan due to the brand's popularity and the country's penchant for unique and regional flavors. Kit Kat's Japanese branch, Nestlé Japan, often releases limited-edition flavors to cater to regional tastes and seasonal events. This results in a continuously evolving selection of unique and diverse flavors.

Video

Do you like cookie bars? Here some recipes you may also like to try.

Ready to get cooking? Remember that you can print this recipe if you would like.