Combine peanut butter, butter and vanilla with a mixer on medium until fluffy.
Mix in powdered sugar a little bit at a time until incorporated.
Stir in the crushed butterfinger bars (reserve some for topping). Chill mixture for 30 minutes.
Roll into balls and place on a parchment lined pan. Chill mixture for 30 minutes.
Combine chocolate chips and oil in a small bowl. Microwave at 50% power for 1 minute. Stir and continue microwaving in 30 second increments just until melted.
Using a fork to dip each ball into chocolate to completely coat. Shake off excess and return to the pan and top with the reserved crushed butterfinger bars.
Continue this process until all the balls are coated with the chocolate.
Allow the chocolate to set at room temperature.
Then the butterfinger balls are ready to serve and enjoy!