last updated on October 29, 2026

For day 7 of my “12 Days of Christmas Recipes” we are making chocolate peppermint oreo cookies! These cookies are THICK and perfect in every way. A velvety chocolate dough, with chunks of peppermint oreos and white chocolate chips!

If you know me well, you know I LOVE thick cookies. Just look at my raspberry white chocolate cookies or my buried treasure cookies, and you’ll see what I mean! These cookies belong in the thick cookie club and are solid club members. They are seriously large, like Levain style large! Each cookie is 6oz, so they are no joke. Of course, if you want smaller cookies, that’s fine too! I have different sizes and cooking times listed in the recipe below. Whatever size you choose, you’ll love these.

what ingredients do i need for these cookies?

butter
brown sugar
eggs
vanilla
flour
cocoa powder
cornstarch
baking soda
salt
crushed peppermint oreos (or peppermint joe-joe’s)
white chocolate chips

ok, how big are these cookies?

These cookies are no joke. They are a whopping 6 oz each! The best way to measure each cookie is to use a kitchen scale. If you don’t have a kitchen scale, just use a measuring cup so each cookie is consistent! When the cookies aren’t the same size, they don’t bake evenly. If you are using measuring cups instead of a scale, 6 oz is about 3/4 cup!

I know not everyone wants 6 oz cookies. If you don’t want them this large, you can do 2-oz cookies instead! Without a kitchen scale, these will be 1/4 cup cookies. I have the cooking times for both cookies in the recipe below.

the importance of letting these cookies cool completely

These cookies are really large, so we are cooking them at a high temp! 400 degrees! Because of the high heat, the outside of the cookie cooks quickly, while the inside remains really soft. You can eat these cookies warm, the inside will be really soft and gooey which is delicious, but I actually prefer these cookies once they’ve set up completely! When these cookies have had enough time to cool down, the inside sets completely, and you’ve got a dense, soft cookie. OH, it’s so good. If you insist on eating them warm, save at least one to cool completely so you can try it! As for how long these cookies take to set up, I would say at least 1 hour; 2+ hours would be ideal. Or you can let them set up overnight! They’re so good the next day.

other recipes in my 12 days of christmas recipes

Ingredients

1 cup butter cold
1 1/2 cups brown sugar
2 eggs
1 tsp vanilla
2 1/2 cups flour
1/2 cup cocoa powder
2 tbsp cornstarch
1 1/2 tsp baking soda
1/2 tsp salt
1 cup peppermint oreos (or peppermint joe-joe's) crushed
1 cup white chocolate chips

Instructions

Preheat the oven to 400 degrees F. In the bowl of a stand mixer combine butter and brown sugar. Mix for 2 minutes until butter and brown sugar are completely combined and fluffier. Add eggs and vanilla and mix until just combined.
Add flour, cocoa powder, cornstarch, baking soda, and salt. Mix until the dry ingredients are just combined. Add crushed oreos and white chocolate chips. Mix until they’re evenly distributed through the dough.
If you have a kitchen scale, measure out 6 oz of dough. If you don’t have a kitchen scale, measure out 3/4 cup of dough. Form the dough into a cylinder shape. This will help the cookie bake well. Repeat with remaining dough. (If you want smaller cookies, measure out 2.5 oz of dough, or 1/4 cup.)
Transfer the dough balls to a lightly greased or lined baking sheet. If you’ve made 6oz cookies, bake for 8-9 minutes, until the outside of each cookie is just set. If you’ve made 2.5oz cookies, bake for 5-6 minutes, until the outside of each cookie is just set.
Let the cookies cool on the baking sheet for at least 10 minutes, then transfer to a cooling rack to cool completely.
Keep any leftover cookies in a sealed container. Cookies will keep for 4-5 days. Enjoy!

What’d you think? I’d love to hear your thoughts or if you have any questions!