Melt butter in lg pot over med heat. Add sugar, dates, egg and salt and cook, stirring occasionally, until sugar is dissolved, about 5 min. Off heat, stir in vanilla, rice krispies and pecans until incorporated. Let cool 15 min.
Place coconut in shallow dish, Shape cooled mixture into 1 in balls, roll in coconut, transfer to parchment lined rimmed baking sheet, and refrigerate until firm, about 15 min. Serve. (Balls can be stored in airtight container at room temp for up to 3 days)