step 1
Melt margarine and toffees in a large pan
step 2
Add marshmallows and gently melt them
step 3
Stir it all well
step 4
Remove from heat
step 5
Stir in rice crispies - if it is too runny add more rice crispies
step 6
Empty into a 10 inch by 12 inch non stick tin
step 7
Spread evenly
step 8
Leave to cool
step 9
Cut up when cool
step 10
Eat!!!