Line a baking sheet with waxed paper and set aside.
Cream together the peanut butter, butter, vanilla extract and powdered sugar together in a large bowl.
Then stir in the crushed Rice Krispies Cereal.
Then shape the mixture into small balls (bite size). Place the peanut butter balls on the prepared cookie sheet with waxed paper and chill in the refrigerator for at least 30 minutes.
Place the chocolate chips and shortening in a microwave safe bowl. Heat in 30 second intervals, stir between each interval until the chocolate is fully melted.
Dip each of the chilled peanut butter balls into the melted chocolate. Lift the ball out of the chocolate with a fork and then transfer them back to the baking sheet.
Once all of your peanut butter balls are coated, put the cookie sheet in the fridge for 15-30 minutes. This will ensure the chocolate coating is completely hardened.
Notes
Refrigerate the peanut butter balls for up to 2-3 weeks or store them in the freezer for up to 2-3 months.