Christmas Kitchen Sink Cookies are for those moments when you want all the best holiday flavors packed into one thick, chewy bite. They take whatever stray chocolate, toffee, and salty-crunchy bits you have in the pantry and turn them into something that disappears from the cookie tin before dinner.

The dough is buttery and simple, and every cookie comes out a little different—one might have a pretzel shard peeking out, the next a melted puddle of white chocolate and a pop of red candy. It is the kind of cookie that makes people reach for a second one before they even finish the first.

Why These Kitchen Sink Cookies Are So Good

They turn leftover ingredients into a deliberate, showstopping bake. A half-empty bag of toffee bits, the last handful of red and green M&Ms, a sleeve of pretzels that has seen better days—all of it finds a home here, no waste and no extra shopping trip required.

The texture is what gets me every time: a crisp ring around the outside, a soft and almost underbaked center, and little pockets of melted chocolate that stay gooey even once the cookies cool. The salty crunch from the pretzels cuts through the sweetness in a way that keeps you coming back.

Ingredients

1 cup (2 sticks) unsalted butter, softened: a full-fat butter gives the dough tenderness and structure.
¾ cup granulated sugar: for crisp edges and just enough sweetness.
¾ cup packed light brown sugar: keeps the centers soft and adds a subtle toffee note.
2 large eggs: bring everything together; cold eggs can make the butter seize up, so let them sit out while you gather the rest.
2 tsp vanilla extract: the warm backbone that ties the mix of add-ins together.
2 ¼ cups all-purpose flour: spooned and leveled, not scooped straight from the bag, so the cookies stay chewy instead of dense.
1 tsp baking soda: gives the cookies a gentle lift.
½ tsp salt: fine sea salt or table salt both work.
1 cup semisweet chocolate chips: use whatever chocolate you have, chips or roughly chopped bars.
1 cup white chocolate chips: these melt into creamy pools and give the cookies that holiday look.
1 cup broken pretzels: small pieces, about the size of a chocolate chip, so you get a salty crunch in every bite.
½ cup toffee bits: the kind with chocolate coating or plain, both add a deep caramel note.
½ cup red and green M&Ms: or any festive candy-coated chocolate; crushed candy canes work in a pinch.

Variations / Substitutions

Dark or milk chocolate: swap the semisweet chips for whatever you prefer, and dial the sweetness up or down that way. Dark chocolate especially complements the salty pretzels.
No toffee bits: chopped Heath bars, Skor bars, or even a crumbled butter toffee candy bar will give you the same buttery crunch.
Nuts instead of pretzels: roasted salted almonds or peanuts keep the salty element and add a different kind of crunch. Use the same 1 cup measure.
Gluten-free: use a 1:1 gluten-free flour blend, and swap the pretzels for gluten-free pretzels or more nuts.
Dairy-free: stick with a plant-based butter for baking and check your chocolate and toffee labels. Many dark chocolate chips are dairy-free.
Mix-in swap: the recipe uses about 3 cups of add-ins total, so you can play with dried cranberries, chopped candy canes, or even popcorn as long as you stay close to that volume.

If a classic chocolate chip cookie is what you are after, try my Chewy Chocolate Chip Cookies next.

How To Make Christmas Kitchen Sink Cookies

Step 1: Cream the Butter and Sugars

In a large bowl, beat the 1 cup softened butter with the ¾ cup granulated sugar and ¾ cup brown sugar on medium speed until the mixture looks fluffy and noticeably paler. This takes a full 2 to 3 minutes with a hand or stand mixer, and it is what builds the light structure that keeps the cookies from turning into hard little pucks.

Scrape the sides down once or twice during those minutes so no butter hides at the bottom. The mixture should resemble damp sand that holds together when pressed.

Step 2: Beat in the Eggs and Vanilla

Crack the 2 eggs into the bowl one at a time, beating well after each until the yolk disappears completely. Then pour in the 2 teaspoons of vanilla and blend just until it streaks through.

The batter will look a little curdled at this stage, and that is perfectly normal. Once the dry ingredients go in, it smooths right out.

Step 3: Whisk the Dry Ingredients

In a separate bowl, whisk together the 2 ¼ cups flour, 1 teaspoon baking soda, and ½ teaspoon salt. Turn the mixer to low and add the flour mixture in two additions, stopping as soon as the last pale streaks disappear.

Overworking the dough at this point makes the cookies tough, so I stop when I can no longer see patches of white flour. A few floury flecks are better than beating the air out.

Step 4: Fold in the Mix-Ins

Dump in the 1 cup semisweet chips, 1 cup white chocolate chips, 1 cup broken pretzels, ½ cup toffee bits, and ½ cup M&Ms. Use a spatula to fold everything together with a wide, scooping motion until the chunks are spread evenly.

The dough will be thick and packed with goodies, and every scoop should grab a little bit of everything. If you see a bare spot, tuck a few extra mix-ins right into the dough before you scoop.

Step 5: Scoop and Bake the Cookies

Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper. Scoop the dough into generous 2-tablespoon mounds and space them about 2 inches apart.

If you want the prettiest cookies, press a couple extra M&Ms and a pretzel piece onto the top of each dough ball right before they go in. Slide the sheets into the oven and bake for 11 to 13 minutes, until the edges are set and lightly golden while the centers still look a touch underdone and puffy.

The tops should appear pale with just a hint of browning at the rim. Pull them out when they still seem a little soft in the middle, because the residual heat will finish them off on the pan.

Step 6: Transfer the Cookies and Serve

Let the cookies sit on the hot baking sheet for 2 minutes to firm up around the edges. Then use a flat spatula to lift them onto a wire rack and let them cool completely.

Stack the cookies onto a festive plate while they are still faintly warm, and hit them with a tiny pinch of flaky sea salt right at the end. That final saline spark makes the chocolate taste deeper and the buttery dough sing.

A Few Tips Before You Start

Chill the dough if you want thicker cookies: even 30 minutes in the fridge helps the butter resolidify and keeps the cookies from spreading into flat discs while they bake. If you can, chill the whole bowl of dough before scooping.
Don’t overmix after adding flour: a heavy hand here knocks out the air you just beat in, and the cookies end up dense. Stop the mixer the moment the flour looks incorporated.
Keep your pretzels in bite-sized pieces: if the chunks are too big, they tear the dough and make the cookies hard to shape. Break them down to roughly the size of a chocolate chip.
Finish with salt: a little flaky sea salt right when they come out of the oven is the simplest way to make every flavor pop, but it is also easy to forget. Set your salt shaker next to the cooling rack before you start baking.

Baking for a crowd? Here is how to scale the dough:

Yield (cookies)	Butter	Granulated Sugar	Brown Sugar	Flour	Eggs	Total Mix-Ins
24	1 cup (2 sticks)	¾ cup	¾ cup	2 ¼ cups	2	3 cups
48	2 cups (4 sticks)	1 ½ cups	1 ½ cups	4 ½ cups	4	6 cups
72	3 cups (6 sticks)	2 ¼ cups	2 ¼ cups	6 ¾ cups	6	9 cups

Keeping the Cookies Fresh

Store cooled cookies in an airtight container at room temperature for up to 5 days. A slice of bread tucked into the container keeps them soft if your kitchen runs dry.

To freeze baked cookies, layer them between sheets of parchment in a freezer-safe bag and pull them out as needed. They thaw at room temperature in about 20 minutes and taste almost fresh from the oven.

Unbaked dough balls freeze beautifully too. Place the scooped dough on a tray in the freezer until firm, then bag them. Bake straight from frozen, adding 1 to 2 extra minutes to the bake time.

Frequently Asked Questions

Can I use all-purpose gluten-free flour?

Yes. A 1:1 gluten-free flour blend works well here. Just check that your pretzels and other mix-ins are gluten-free, too, if that matters.

Why did my cookies spread into thin puddles?

Warm butter, overmixing the dough, or not enough flour can all cause flat cookies. Next time, chill the dough for at least an hour and make sure you spoon and level the flour instead of digging the measuring cup into the bag.

Do I have to chill the dough?

No, you can bake right away and still get a delicious cookie. Chilling just gives you a thicker, chewier center with a more pronounced contrast between the crisp edge and the soft middle.

Can I use only chocolate chips and skip the pretzels and toffee?

Absolutely. Keep your add-in total around 3 cups so the ratio of dough to goodies stays right. Three cups of straight chocolate chips makes a ridiculously rich cookie that is hard to resist.