Cheesecake Sugar Cookie Bars

favorite sugar cookie recipe, or 1 (17.5 oz) pkg sugar cookie mix in a pouch, by betty crocker

sm box(4 serving size) french vanilla instant pudding

Tbsp    brn sugar ( packed)

stick    melted butter= 1/2 cup

vanilla extract

2 eggs + plus 3 yolks

pkg (8oz) cream cheese @ room temp.

sour cream

white granulated sugar

optional: toffee bits, ( pulverized in a blender or food processor)