Preheat oven to 350 F. Line a baking sheet with parchment paper or silicone baking mat.
Sift together flour, salt, and baking soda.
Cream softened butter, sugar and brown sugar until fluffy. Beat in eggs one at a time, then add vanilla.
Stir in flour mixture until well combined. Fold in chopped Heath candy bars.
Chill cookie dough for at least 30 minutes, up to overnight.
Scoop 2 tablespoons of cookie dough, gently form into a ball shape, and place on ungreased cookie sheet, dough balls about 3 inches apart.
Bake 10-12 minutes, checking after about 8 minutes for browned edges.