Orange Cake with Whipped Orange Buttercream

0 Preheat the oven to 375°.
1 Grease and flour 3 8-inch round cake pans.
2 Mix the dry ingredients together and set aside.
3 Beat the egg yolks until they are light, thick, and lemon colored and form a ribbon when you pull the beaters out.
4 Set aside.
5 Cream the butter thoroughly.
6 Add the sugar gradually and beat until light and fluffy - [timer minutes=0]5 minutes[/timer] on high.
7 Add the egg yolks and beat well.
8 Mix the milk, orange juice, vanilla, and orange zest.
9 Add the flour alternately with the milk mixture beating thoroughly after each addition.
10 Spoon into prepared pans.
11 Bake for [timer minutes=0]20 - 30 minutes[/timer] or until cake tests done.
12 Cool in pans [timer minutes=0]5 minutes[/timer].
13 Turn out carefully to cool completely.
Frosting
16 Beat the butter until fluffy.
17 Add 2 cups Confectioner's sugar and the water enhancer.
18 Beat until well mixed.
19 Add 1 cup of the sugar at a time, beating well after each addition.
20 With mixer on high speed add the cream slowly and whip for 3 to 5 minutes, or until thick and creamy.
Assembly
23 Smear a tablespoon or so of frosting on your cake plate.
24 Add the first layer and press down gently.
25 Add a 1/2 cup or so of the frosting.
26 Add the next layer and press down gently.
27 Repeat
28 Frost the top and sides of the cake.