Cakes: Fluffy Gold Cake

Mom's handwriting on this recipe card looks like she was in a hurry.  Try this recipe for the first time when you're in an adventurous mood and it doesn't matter how well the cake turns out.

          Fluffy Gold Cake

          Sift together into a bowl:
               2 cups Softasilk*
               1 1/2 cups sugar
               3 tsp baking powder
               1 tsp salt
          Add :
               1/3 cup shortening
               2/3 cup milk
               1/2 tsp lemon extract
               1/2 tsp vanilla
          Beat vigorously 2 minutes.
          Add:
               1/3 cup milk
               1/3 cup unbeaten egg yolks (4 medium)
          Beat 2 more minutes.
          Oven: 350 F
          30 to 35 minutes

I'm guessing the "gold" comes from the egg yolks.  Eggs from free-range chickens will probably produce a yellower cake than typical inexpensive commercial eggs.

* Softasilk is a brand name of cake flour.