Add caramel and mix together with Paddle scraper until cream and caramel are just blended. (Too much mixing will make the mixture too thin.)
Using the Grater Bowl, grate the 2 peppermint crisps.
Place a layer of tennis biscuits in the base of Rectangle 1.
Pour half of the caramel/cream mixture on top.
Sprinkle with half of the grated peppermint crisps.
Add another layer of each, ending with a layer of peppermint crisp.
Seal and refrigerate until serving time.
Notes
Use the Quick Shake to whip cream without electricity. Chill the cream, place in the Quick Shake and shake vigorously for 3-4 minutes until you have the desired thickness.