Prepare angel food cake according to directions on box. Let cool.
Scald 2 cups milk.
In top of double boiler, mix egg yolks, sugar, flour and salt. Add milk slowly. Cook until slightly thick over hot, not boiling water. While hot, add gelatin soaked in bourbon.
When cool, fold in whipped egg whites, vanilla extract and whipped cream. Break up angel food cake.
In an angel food pan, alternate layers of cake and custard. Cover and refrigerate overnight. Unmold.