preheat oven to 350 degrees.   get the eggs and cream cheese to room temperature.  melt one stick of butter.  mix the yellow cake mix, 1 egg, and the melted butter together, this makes the crust.  spread this into a 13X9 greased baking dish.  set aside.

melt the other stick of butter(for like 20-30 seconds in microwave), let cool.  with a hand mixer, beat the cream cheese until smooth.  add 2 eggs and vanilla.  then add the melted butter and beat until smooth.  add the sugar, amd nix well.  spread this over the crust.  Bake 40-50 minutes.  you want the center to be slightly gooey.  I usually check at 30 minutes, if the crust has risen, and the top is starting to brown, i shake it and see how gooey it is!  Do not over bake!!  let it cool, then cut into finger sized pieces.

This is always a fabulous desert!  Even my family that doesn't eat sweets won't turn this down!!