Preheat the oven to 350°F (175°C) and line baking sheets with parchment paper.

In a large bowl, cream together the butter, brown sugar, and granulated sugar for about 2 minutes until light and fluffy.

Beat in the eggs one at a time, then add the vanilla extract.

Add the flour, baking soda, and salt. Mix just until combined.

Gently fold in the semi-sweet chocolate chips, white chocolate chips, M&M’s, and holiday sprinkles.

Scoop the dough using a 2-tablespoon cookie scoop and place dough balls on the prepared baking sheets, leaving 2 inches between each cookie.

Bake for 11–13 minutes, until the edges are lightly golden and the centers are soft.

Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.