Which food, when you eat it, instantly transports you to childhood?

My favourite biscuits when I was a child were custard creams, a layered sandwich of two biscuits with a creamy vanilla layer in the centre. You would twist them apart and lick off the filling, then dunk the biscuits in a cup of tea, carefully soaking them and eating them before they got too soggy and fell apart.

Sometimes mom would buy a crispy slightly oatier version with a lemony centre to it which would be eaten in the same way.

Just reading the prompt took me back to our living room, sitting at the dining table with a China cup and saucer and matching plate. Milk jug and teapot. The biscuits were eaten after heinz  sandwich spread sandwiches on white bread.

I also remember the rusty orange settee and the wallpaper with tiny rosebuds and ribbons printed on it.

Dad bought home a wallpaper book once, full of swatches of paper patterns in various colours. So exciting to look at.