Preheat oven to 375 degrees
In a medium bowl, whisk flour, salt, and baking soda
In your mixer bowl, beat softened butter, sugars, and peppermint extract until nice and fluffy.
Add in and beat eggs one at a time, just until incorporated
Continue beating with the mixer and add food coloring. It will be a very strong color because we have not added the flour yet.
Slowly add and beat in the flour mixture
With a stiff spoon, stir in M&M's and Chocolate Chips
On a parchment lined baking sheet, add 1" tablespoon drops of cookie dough about 1-2 inches apart. 12 cookies fit on a standard cookie sheet.
Bake for 8-11 minutes until edges start to brown.
Remove from oven, let cool 5 minutes, transfer to baking sheet
Continue with subsequent batches