Cream together butter, sugars, eggs, and vanilla. In a separate bowl mix flour, oats, salt, and baking powder. Mix creamed + dry ingredients. Add chocolate chips, melted chocolate, and nuts. Place dough (golf ball size or smaller) on an ungreased cookie sheet. Bake at 350° for 8 minutes. Yield: 3-4 dozen.
Update: I decided to bake the remaining dough in a glass dish because it is so thick and hard to scoop. It crumbled into chunks and is very good - almost like a fudge.