Using an electric mixer, combine the cookie butter, butter, vanilla, and salt until well combined.
Add in the powdered sugar ½ cup at a time, until the mixture is dough-like and can be formed into a firm ball.
Shape the mixture into 1" balls and place on a lined baking tray. Refrigerate until firm, about 1 hour.
Put the white chocolate chips and shortening in a microwave safe bowl, and microwave on high power in 15 to 30 second intervals, stirring between heat cycles until the chocolate has melted.
Dip each cookie butter ball into the melted chocolate using a toothpick or a fork, shake off the excess and return to the lined baking tray. If desired, sprinkle a bit of Biscoff cookie crumbs over the top of each while the chocolate is still wet. Let set before serving, about 20 minutes.
Notes
Calories are automatically generated. For best results calculate based on your exact ingredients.