Preheat oven to 350 degrees.
Combine sugar, butter, egg, peppermint extract and vanilla in bowl. Beat on medium speed until creamy.
Add flour, baking soda, salt, cream of tarter and mix on low speed until mixed well.
Fold in Andes peppermint crunch baking chips.
Roll dough into medium size balls and place on baking sheet (use parchment paper or silicone baking mat) two inches apart.
Bake for 8-10 minutes depending on your oven. Do not over bake. Watch carefully.
Place cookies in cooling rack and let cool.
Enjoy!