In a bowl add the butter and sugars and cream together until smooth.
Add the eggs and blend well.
Mix in the cornstarch, baking soda, salt and vanilla.
Pour in the chopped Andes candies, mixing together.
Add in the chocolate chips.
Pour in the flour one cup at a time until blended well. The batter should form together and begin to pull away from the bowl.
Place the dough in a smaller bowl (so it fits) in the fridge and allow to chill for a few hours, firming up the butter.
Remove the dough from the fridge and preheat the oven to 375℉.
Get about 1 1/2 Tablespoons amount of dough and form into a ball.
You can add more mints by pressing a hole in the middle and adding half a chocolate candy into the middle of the cookies and closing it inside.
Bake the cookies for 13 minutes. Allow to cool on the baking sheet for 2 minutes before removing from the sheet and placing on parchment paper to cool.