World'S Best Brownies
["3/4 c. butter", "2 c. sugar", "3 jumbo eggs", "1 c. flour", "4 (1 oz.) sq. unsweetened chocolate", "1 to 1 1/2 tsp. vanilla (to taste)", "2 (1 oz.) sq. semi-sweet chocolate", "1 1/4 c. chopped pecans (no substitute)"]
["Melt butter and chocolate.", "Let cool.", "Meanwhile, cream eggs and sugar well.", "Add all other ingredients including butter and chocolate.", "Pour into a greased 9 x 13-inch pan.", "Bake 30 to 32 minutes at 350\u00b0.", "You may want to put foil around the edges of the brownies before you bake them to avoid overbaked edges."]
["butter", "sugar", "eggs", "flour", "unsweetened chocolate", "vanilla", "semi-sweet chocolate", "pecans"]