I used to make my Mars bar slice
6 - 8 mars bars melted
3 cups rice bubbles (i am choosing the antipodean version as opposed to the rice krispie nonsense)
tablespoon butter melted
2-4 blocks Cadbury dairy milk melted
(all depends on how piggy you are feeling)
Mix mars bubbles together
Put in pan, smoosh down flat and solid
Mix butter and chocolate
Pour choc mix over bubble mixture
Refridgerate
Cut in pieces
Eat lots before giving to kids
Hide most then eat it and tell the kids you only made a small amount.