Preheat the oven to 350. Line baking sheets with parchment paper
Whisk together flour, salt, baking powder and baking soda in a bowl, set aside
Melt white chocolate in the microwave just until smooth
In another bowl beat butter and sugar until creamy, beat in white chocolate
Add eggs one at a time beating in each egg, beat in vanilla
Stir in flour mixture until well combined.
Fold in Payday pieces, mixture will be quite soft. Refrigerste until firm enough to roll
Roll into 1 inch balls and place 2 inches apart on prepared pans. Bake 9 to 13 minutes until lightly set. Cool in pans 5 minutes then transfer to racks to cool