In a saucepan, melt together your butter, milk chocolate and marshmallows. Stir throughout, it will take a little while, but don't let it stick. It will be smooth, thick and sticky once done.

Place your rice krispies in a large bowl and pour over your very sticky marshmallow mixture. Try to mix it in with a spatula so that your rice krispies are evenly covered. However, I always find I end up using my hands - it's very sticky but worth it!

Once the rice krispies are coated spoon them into a prepared 9x9 inch square tin (with non-stick baking paper in it). Press them in so they're nice and firm. I like to use a potato masher to push them down.

Melt your milk chocolate and spoon over the base evenly.

Chop your Crunchie bars into random size pieces and place / sprinkle them all over your melted milk chocolate.

Place in the fridge to completely set and chilled.

Once set, remove from the tin and cut into squares. Enjoy!