Preheat your oven to 350°F (175°C). Line your baking sheets with parchment paper or a silicone baking mat, this keeps your cookies from sticking and makes cleanup a breeze.

In a medium bowl, whisk together the flour, baking soda, and salt. Set aside. This step ensures the dry ingredients are evenly distributed before adding them to the wet ingredients.

In a large mixing bowl, beat together the butter, granulated sugar, and brown sugar. Use an electric mixer on medium speed and beat for 2-3 minutes until the mixture is light and fluffy. This step is key to making soft and chewy cookies!

Add the vanilla extract and eggs, one at a time, beating well after each addition. This helps the eggs fully incorporate into the dough for a smooth consistency.

Gradually add the dry ingredient mixture to the wet ingredients. Mix just until combined, overmixing can make your cookies tough instead of soft.

Gently fold in the Christmas M&M’s and Semi-sweet chocolate chips. If you have little ones helping, let them do this part. Just be prepared for a few M&M’s to go missing in the process.

Using a cookie scoop or a spoon, drop rounded tablespoons of dough onto your prepared baking sheets, spacing them about 2 inches apart. Bake for 10-12 minutes, until the edges are lightly golden but the centers are still soft. The cookies will continue to set as they cool.

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