To make brow butter, place Maven Butter in thick bottom skillet or pan under medium heat. Once melted, the butter will foam up a bit, then subside. Watch carefully as lightly browned specks begin to form at the bottom of the pan. Smell the butter; it should have a nutty aroma. Set aside and allow to cool.
Put brown butter, egg, salt, and Baker's Delite Butterscotch Mix in a bowl.
Mix for 1 minute at low speed then stir 3/4ths of the walnuts and 3/4ths of the chocolate chips until evenly blended.
Spread batter evenly in pan, then add remaining walnuts and chocolate chips on top. Lightly sprinkle rock salt.