Preheat oven to 350 degrees.
Cream the butter in the bowl of an electric mixer.
Add both sugars and beat until light and fluffy, about two minutes.
Add the vanilla, then the eggs one at a time, waiting until the first is fully incorporated before adding the next.
In a separate bowl whisk together the dry ingredients (excluding the Andes chips/pieces) and add to the butter mixture until fully combined.
Mix in the Andes baking chips/pieces last.
Chill dough for at least 30 minutes before portioning into 36 evenly sized balls.
Lightly press with your palm to flatten the cookie a bit before placing on a parchment-lined baking sheet.
Bake the cookies for 8–9 minutes, until just set on top.
Cool on the baking sheet 2 minutes before transferring to a wire rack.