Whisk together flour, cocoa, and salt.
In a separate bowl, cream together butter and sugar until fluffy.
Add in egg and peppermint and mix until blended.
Slowly add flour mixture into creamed mixture.
Shape dough into a 1 1/2″ – 2″ round roll and wrap in wax or parchment paper.
Place in freezer for 1 hour to firm up.
Preheat oven to 350F
Line a baking sheet with parchment paper
Slice into 1/4″ thick cookies; Place slices on prepared sheet.
Bake 10 to 12 minutes.
Allow to cool.
Line a baking sheet with parchment paper.
Melt chocolate by microwaving 45 seconds then stirring and repeating until chocolate is smooth and melted.
Dip cookies in the chocolate and lift out with a fork shaking off excess.
Place the cookies on prepared sheet and allow to set.