1 cup butter1/2 cup cocoa2 cups sugar4 eggs2 tsp vanilla1 1/2 cups flour, sifted1 cup coarsely chopped pecans In a large sauce pan melt butter.  Remove from heat.  Add cocoa and sugar.  Blend in eggs one at a time. Add vanilla. Stir in flour and nuts.  Spread in a greased and floured 13″ X 9″…