You can use soft brown sugar instead of caster sugar, and golden syrup instead of treacle.
Cover with a small amount of water and evenly spread then sprinkle with sugar before baking.
It's probably my rubbish baking skills by I really didn't like this. It was dry and crumbly and didn't go all gooey after a couple of days. I didn't really enjoy making it either. Very sorry. - 09 Mar 2012
So quick and easy! Much nicer if left a couple of days too, goes nice and sticky. - 29 Mar 2011
Used different ingredients. I used syrup instead of treacle - just as nice! - 29 Mar 2011