Line tray with wax paper.
In a bowl of electric mixer beat butter, brown and white sugars until smooth, about 2 minutes.
Add vanilla, salt and heat-treated flour. Mix to evenly combine.
Stir in add-ins of choice.
Shape into balls using 1-tablespoon portion scoop or 2 spoons.
If desired roll in sprinkles, chocolate chips or chopped nuts.
Refrigerate up to 1 week, freeze up to 1 month.