Mix together peanut butter, powdered sugar and softened butter.
Roll into desired-size balls, and place on a pan.
Use a toothpick to poke a whole in the top of each ball. Use 1 toothpick or a separate toothpick per ball.
Chill in refrigerator for 30 minutes.
Melt chocolate chips and shortening and stir until smooth using microwave or double broiler.
Use a toothpick to dip each ball into the melted chocolate covering the desired amount of the balls with chocolate.
Return to the pan to set up.
If desired, use your finger to fix the hole from the toothpick.
Store in the refrigerator.