Line baking sheet with waxed paper; set aside

In med bowl mix peanut butter, butter, vanilla, and sugar with hands to form a smooth stiff dough. Shape into balls using 2 tsp of dough for each ball. Place on prepared pan, refrigerate.

Melt shortening and chocolate together in a metal bowl over a pan of lightly simmering water. Stir occasionally until smooth and remove from heat.

Remove balls from refrigerator. Insert wooden toothpick into ball and dip in chocolate. Return to wax paper chocolate side down and remove toothpick. Repeat with remaining balls. Refrigerate 30 min to set.