Toffee Bars
["1 c. butter, softened", "1 c. brown sugar", "1 egg yolk", "1 tsp. vanilla", "1/4 c. flour", "2 c. chocolate bits", "1 c. chopped nuts"]
["Preheat oven", "to 350\u00b0.", "Grease a 13 x 9 x 2-inch baking pan. Beat butter, sugar, egg yolk and vanilla in a large bowl with electric", "mixer", "at", "high", "speed until moist, crumbly and mixture begins", "to", "gather", "around beater; stir in flour until blended. Press batter evenly in prepared pan."]
["butter", "brown sugar", "egg yolk", "vanilla", "flour", "chocolate bits", "nuts"]