Prepare the dates: Chop the dates into small pieces and set aside.
Make the date mixture: Melt the butter in a saucepan over medium heat. Add the sugar and dates, stirring until the dates soften and the mixture becomes sticky.
Add the egg and vanilla: Remove from the heat and quickly stir in the beaten egg and vanilla essence. Return to low heat and stir for a few minutes until combined.
Combine with biscuits: Add the crushed biscuits and coconut to the date mixture. Mix well until everything is evenly coated.
Shape the dadelvingers: Allow the mixture to cool slightly. Shape into small finger-sized pieces or press into a lined dish and cut into bars.
Coat with coconut: Roll each piece in extra coconut until fully covered.
Chill: Place in the fridge for at least 1–2 hours until firm.