Preheat oven to 350°F. Line a baking sheet with parchment paper or use a silicone mat.
Prepare basic cookie dough.
Add food coloring and peppermint extract to basic cookie dough and mix very well.
Roll into balls and place on prepared baking sheet. Lightly press down each cookie ball using a flat bottom glass dipped in water. Sprinkle lightly with granulated sugar if desired.
Bake for 8-10 minutes or until edge are set and slightly golden brown.
Remove to wire rack and cool completely.
Crush peppermint in a resealable bag using a rolling pin. Then melt chocolate in a microwave safe bowl.
Dip edge of cookie into chocolate and immediately add crushed peppermint. Place on wire rack to set.
Store in an airtight container.