Preheat your oven to 350 degrees Fahrenheit and line two baking sheets with parchment paper.
In a large bowl, cream together the softened butter, light brown sugar, and granulated sugar until light and fluffy.
Add the egg yolks and vanilla to the butter mixture and mix until pale and fluffy.
Gradually add the flour, baking powder, baking soda, and salt, and mix until combined.
Fold in the M&M's, white chocolate chips, pretzel pieces, potato chip pieces, and sprinkles until evenly distributed.
Scoop the dough into 20 balls and place them on the prepared baking sheets, about 2 inches apart.
Optional: Add a few extra mix-ins on top of the dough balls for an extra festive touch.
Bake for 10-12 minutes until golden brown.
Optional: Use a large circular cookie cutter to shape the cookies for a perfect round shape.
Let the cookies cool on the baking sheets for 5 minutes, then transfer them to a wire rack to cool completely.
Store any leftovers in an airtight container for up to three days.
Get ready to delight your taste buds with these irresistible cookies that are perfect for spreading holiday cheer!