Preheat your oven to 350℉ and line a cookie sheet with parchment paper or a silicone baking mat.
Cream together the butter and sugars for about 2-3 minutes.
Add the egg and vanilla and mix for another 2-3 minutes.
Add the flour, baking powder, and baking soda, then stir just until combined.
Fold in the heath bar bits and scoop about 2 tablespoons of the dough onto your parchment lined cookie sheet with a cookie scoop. Continue scooping the dough on the cookie sheet about 2-3 inches apart.
Bake for 10-12 minutes and allow to cool for about 5 minutes on the cookie sheet before moving to a cooling rack to cool completely.