1/2 Cups Butter

12 Ounces Butterscotch Chips

1/2 Cups Firmly Packed Brown Sugar

2 Eggs

1 1/2 Cups Flour

2 Teaspoons Baking Powder

1/2 Teaspoons Salt

2 Teaspoons Vanilla

12 Ounces Chocolate Chips

2 Cups Mini  Marshmallows

1 Cups Chopped Pecans

Preheat oven to 350 degrees. In a medium saucepan melt butter over medium heat. Add butterscotch chips and brown sugar, stirring until melted.  Remove pan from heat and stir in eggs; add flour, baking powder, and salt. Stir in vanilla and set aside to cool. When cool stir in chocolate chips, marshmallows, and pecans. Spread into a greased 9 X 13 inch pan. Bake for 25 minutes. Remove from oven and let cool completely. Cut into squares.