Preheat your oven to 350°F and line a baking sheet with parchment paper. This will make your cookies bake evenly and help with easy cleanup!
In a large mixing bowl, whisk together the melted butter, brown sugar, granulated sugar, vanilla, and egg. The key here is to mix until everything is smooth and combined, but don’t overdo it!
In a separate bowl, whisk together the flour, baking soda, and salt. This step is all about making sure your cookies rise just right.
Slowly fold the dry ingredients into the wet mixture. You’ll want to do this gently—just until it’s combined, no need to go crazy here!
Now, for the best part: stir in your red and green M&Ms, white chocolate chips, pretzels, potato chips, and sprinkles. The combination of sweet, salty, and colorful makes these cookies irresistibly festive.
Using a cookie scoop (or about 1½ tablespoons per cookie), place dough balls onto your prepared baking sheet, spacing them 2-3 inches apart. Pop them into the oven and bake for 11-12 minutes, or until the edges just start to turn golden brown.
Let your cookies cool on the baking sheet for about 5 minutes before transferring them to a cooling rack to cool completely. This part is tough because they’ll smell so good, but it’s worth the wait!