You’ll Need:

250ml Orley Whip or whipping cream, whipped to soft peaks
2 packets of Tennis biscuits (although you will probably use less)
375g tin of caramelised condensed milk or dulce du leche
20ml caster sugar
3 Peppermint Crisp chocolate bars, crushed
3-4 drops of peppermint essence (more, if you like it minty)

How to:

Whip the Orley Whip and then add the caramelised condensed milk, castor sugar and peppermint essence. Beat until well mixed and then stir in ⅔ of the crushed Peppermint Crisp.
Place a layer of whole tennis biscuits in a buttered 29x19x5cm dish. Spoon ⅓ of the caramel mix over the biscuits and spread evenly. Continue in layers, finishing with a layer of filling on top.
Refrigerate for at least 4 hours. Decorate by sprinkling the remainder of crushed peppermint crisp on top. Cut into squares and serve.