Pie Crust
["3 1/2 c. flour", "1/2 c. sugar", "1 1/2 c. chilled butter", "1 c. chilled shortening", "2 egg yolks", "1 tsp. salt", "3/4 c. ice water", "1 tsp. mace", "1 Tbsp. vinegar"]
["Whip egg yolks, vinegar and ice water together before using."]
["flour", "sugar", "butter", "chilled shortening", "egg yolks", "salt", "water", "mace", "vinegar"]