I don't think a cook's job should be to deceive, but there is something appealing about the fact that this looks and tastes as if it were incredibly hard work and yet involves not more than a bit of stirring. You must, though, serve a warm sauce with it - it's the crowning glory - and I've certainly given you options below. To be frank, you can choose different biscuits/cookies, different nuts and different nubbly bits generally to mix in with the ice cream and give crunch, texture and sudden shards of flavour. I find it hard to believe, however, that this could be in any way improved. Sorry, but that's just how it is.
Let the ice cream soften either in the refrigerator for a while, or out in the kitchen.
Line a 8-inch springform tin with clingfilm/clingwrap, both in the bottom and sides of the tin so that you have some overhang at the top.
Empty the slightly softened ice cream into a bowl and mix in the peanuts, 150g/1 cup chocolate and peanut morsels or chips, Crunchie shards/honeycomb shards and 100g/1 cup of the Bourbon biscuit crumbs/chocolate cookie crumbs.
Scrape the ice cream mixture into the springform tin flattening the top like a cake, and cover the top with clingfilm/clingwrap and place in the freezer to firm up.
Serve the cake straight from the freezer, unmould from the tin and pulling the clingfilm/clingwrap gently away before putting on a plate or cake stand.
Sprinkle the top of the cake with the extra 50g/1/4 cup of chocolate and peanut morsels or chips, and the remaining Bourbon biscuit crumbs/chocolate cookie crumbs.
Cut into slices and serve with the butterscotch and chocolate sauces, letting both dribble lacily over each slice. If 2 sauces sound like too much trouble - they're not - just opt for the chocolate peanut butter sauce. It's hard to find an argument against it.
Recipe courtesy of Nigella Lawson(Copyright 2007, Nigella Express, Hyperion, All Rights Reserved)