© Denzil Green
Twinkies are small, gold-coloured sponge cakes filled with vanilla-flavoured "cream." The cream filling is injected through 3 holes in the top. It's packaged upside down, with the brown top on the bottom.
Up till around the 1960s, Twinkies used actual dairy in the cream filling. Now, the filling is dairy-free.
Since 2007, a banana-flavoured cream has also been available.
Twinkies have been made for decades. Kids still get them in their lunch boxes, and still take time to lick the white cardboard bottom of the packaging.
They are made by Hostess, which in turn is owned by Hostess Brands, the same company that makes Wonder Bread and that sponsored the Howdy Doodie show.
Christopher Sell in Brooklyn, New York is making and selling hot, deep-fried Twinkies (as of 2004.) The Twinkies are dipped in batter and then deep-fried. Some say they are actually quite good.
Foodies see Twinkies as a "trailer-trash" food. But someone's buying them: in 2001, Hostess sold half a billion Twinkies.
The starting price was 2 for 5 cents. The flavour of cream-filling was banana up until the Second World War, when Hostess switched to vanilla flavouring owing to a banana shortage. The reintroduction of the banana flavoured was trialled in 2005, and made permanent in 2007. 
Literature & Lore
It's also a myth that the cake is actually a sea critter related to sponges.
 Shepherd, Lauren. Hostess selling banana-creme Twinkies. USA Today. 13 June 2007.
Hulchy, Patricia. Deconstructing the Twinkie. The Toronto Star. Toronto, Canada. 15 April 2007.
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