Lemon Cake

Directions

1. 1
   Prepare cake using box directions.
2. 2
   Let cool.
3. 3
   Combine sugar and lemon juice in saucepan.
4. 4
   Add yolks.
5. 5
   Cook and stir over medium heat until bubbly.
6. 6
   Reduce heat and stir for 2 minutes.
7. 7
   Add butter a few pieces at a time.
8. 8
   Stir until melted.
9. 9
   Transfer to a bowl and cover with plastic wrap.
10. 10
    Chill.