Sift flour, baking soda, and salt together.
In a bowl of an electric mixer, beat together melted butter, brown sugar, and white sugar.
Beat in vanilla, egg, and egg yolk until light and creamy.
Mix in sifted ingredients until just blended.
Stir in candy bars and chocolate chips by hand.
Refrigerate dough for 1 hour
Preheat oven to 350 degrees F
Drop cookies onto Silpat mat on a sheet pan or cookie sheet 2 inches apart. (I used a spring-form scoop to scoop the dough for exact sized cooikes.)
Bake for 14 to 16 minutes until edges are lightly browned.
Cool on the sheet pan 2 minutes before removing to a wire rack to cool.
Serve warm or cool.
Store in an airtight container.