Banana Brownies
["3 extra-ripe medium bananas", "2 c. sugar", "1/2 c. butter or margarine, softened", "2 eggs", "1 tsp. vanilla extract", "2 c. all-purpose flour", "1/3 c. cocoa powder", "1 tsp. baking powder", "1 tsp. cinnamon", "1/2 tsp. salt", "1 c. chopped nuts (optional)"]
["Puree bananas in blender; should be 1 1/2 cups.", "In bowl, beat sugar and butter until light and fluffy.", "Beat in eggs and vanilla, then bananas.", "Combine dry ingredients.", "Add to banana mixture and beat until well blended.", "Stir in nuts.", "Pour into well-greased 9 x 13-inch baking pan.", "Bake at 350\u00b0 for 30 to 35 minutes.", "Cool on rack 10 minutes.", "Cut into squares."]
["bananas", "sugar", "butter", "eggs", "vanilla extract", "flour", "cocoa powder", "baking powder", "cinnamon", "salt", "nuts"]