Preheat oven to 350 degrees F. Line a baking sheet with parchment paper or silicone mat.

In a large bowl, beat the butter until fluffy.

Add sugar and salt and beat until well combined and fluffy.

Beat in the egg and vanilla until well combined.

Gradually add the flour and beat until well combined.

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.

Melt chocolate in microwave safe bowl. Dip edge of cookie into chocolate and immediately add crushed peppermint

Set on wire rack to set. Store in airtight container