Preheat Oven:

Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper or silicone baking mats.

Cream the Butter and Sugars:

In a large mixing bowl, beat the softened butter, granulated sugar, and brown sugar until light and fluffy.

Add the Wet Ingredients:

Beat in the eggs, one at a time, followed by the vanilla extract until fully incorporated.

Combine the Dry Ingredients:

In a separate bowl, whisk together the flour, baking soda, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, mixing until just combined.

Fold in Mix-Ins:

Gently fold in the M&M’s, white chocolate chips, crushed pretzels, toffee bits, nuts (if using), and sprinkles.

Shape the Cookies:

Scoop about 1 1/2 tablespoons of dough for each cookie and roll into balls. Place them on the prepared baking sheets, spacing them about 2 inches apart.

Bake:

Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden. The centers will still look soft but will set as they cool.

Cool:

Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.