Angel Delight
Whisk powder into cold milk and watch it become a dessert.
Butterscotch or strawberry powder that turned half a pint of milk into a mousse in about ninety seconds.
It was the pudding children were allowed to make. The transformation from thin pink liquid to something that held a spoon upright felt like chemistry.
Butterscotch is the correct answer and always has been. Strawberry is for people who are wrong.
Cost back then
11p a sachet
Goes for now
About £1