Gather peanut butter, powdered sugar, butter, vanilla extract, and chocolate for coating if desired
Mix peanut butter, softened butter, vanilla extract, and powdered sugar in a bowl
Stir until a thick dough forms
Chill the mixture until firm enough to handle
Roll the mixture into small balls
Place the balls on a lined tray
Chill or freeze the balls until firm
Melt chocolate if coating
Dip each ball into melted chocolate
Return coated balls to the tray
Chill until the chocolate sets
Store in an airtight container in the refrigerator