Definition: In this task, you have to generate the title of the recipe given its required ingredients and directions.
Input: ingredients:  '2 cups butter, softened', '1 cup white sugar', '4 cups all-purpose flour', '2 teaspoons cornstarch',<sep> directions: 'Preheat oven to 325 degrees F (170 degrees C).', 'Cream softened butter thoroughly. ( If using margarine, add four drops of butter flavoring.) Slowly add sugar.', 'Sift flour and corn starch before adding. Mix well. Press into an ungreased jelly roll pan 11 x 15 x 1 1/2 inches.', 'Bake 30 minutes or until very light brown. Score and cut while warm.'

Heavenly Shortbread