01 - In a large bowl, beat the peanut butter, softened butter, vanilla extract, and salt together using a hand or stand mixer until the mixture is smooth and creamy.
02 - Gradually blend in the powdered sugar, adding one cup at a time, until the dough becomes stiff enough to handle without sticking to your fingers.
03 - Scoop tablespoon-sized portions of the dough and roll them between your palms to form smooth, uniform balls. Arrange them on a parchment-lined baking sheet.
04 - Refrigerate the shaped peanut butter balls for 30 minutes until they are firm to the touch.
05 - In a microwave-safe bowl, combine the chocolate chips and shortening. Microwave in 30-second bursts, stirring thoroughly between each interval, until the chocolate is completely melted and glossy.
06 - Using a toothpick inserted into the top of each ball, dip it into the melted chocolate, leaving the top third exposed to resemble a buckeye nut. Gently tap off any excess chocolate.
07 - Return each dipped ball to the parchment-lined baking sheet and refrigerate for 15 to 20 minutes until the chocolate shell is fully set. Remove the toothpicks and lightly smooth over any holes if desired.