Butterscotch Bars
["1 c. butter", "1 c. brown sugar", "1 egg yolk", "1 tsp. vanilla", "2 c. flour", "1/4 tsp.salt", "2 c. butterscotch chips"]
["Cream butter thoroughly, then add sugar and beat well.", "Put egg yolk and vanilla in and beat well.", "Add dry ingredients and mix.", "Bake in 9 x 13-inch pan for 20 minutes at 350\u00b0.", "These melt in your mouth if eaten while still slightly warm."]
["butter", "brown sugar", "egg yolk", "vanilla", "flour", "tsp.salt", "butterscotch chips"]