Wiktionary
sugar mouse
n. A traditional sweet, based on icing sugar, in the shape of a mouse, often fitted with a piece of string for a tail.
Usage examples of "sugar mouse".
THE BOY WANTS A PAIR OF TROUSERS THAT HE DOESN'T HAVE TO SHARE, A HUGE MEAT PIE, A SUGAR MOUSE, 'A LOT OF TOYS' AND A PUPPY CALLED SCRUFF.