Add the double cream and condensed milk to a large mixing bowl and whisk with an electric mixer until it has thickened to soft peaks.
Chop the Crunchies into chunks (as big or small as you like). Reserve a handful for the top then add the rest to the mixture along with the chocolate chips. Fold in using a spatula.
Pour the mixture into a large tin (I use a 23cm x 23cm square tin) and smooth out with a spatula. Sprinkle with the remaining Crunchie pieces and freeze for at least 3 hours until solid.
Notes
To serve: Remove from the freezer around 10 minutes beforehand for easier scooping. You can also dip the ice cream scoop in hot water to help with scooping too.Substitutions: For tips on any recipe substitutes, see the blog post and FAQ section above.