McVitties Milk Chocolate Digestives, i can eat them by the truckfull.
Crusha Stawberry Milkshake, before they changed the reciepe. At least a pint and a half of full fat milk with vanilla icecream all in a blender until really frothy. Glugged down within a matter of seconds.
Both can be acompanied by a damn good blast on the Mega Drive just for that full old skool memory lane experience.