Definition of brownies:
(n) :
(usually countable, baking, originally US) A small square piece of rich cake, usually made with chocolate.
(n) :
(countable) (folklore) A mythical creature, a helpful elf who would secretly do people's housework for them.
(n) :
(uncountable, baking, Australia and New Zealand) A sweet bread with brown sugar and currants.
(n) :
(countable) A copper coin, brown in colour; a penny, halfpenny, or cent.
(n) :
(countable) (paganism) A household spirit or revered ancestor.
(n) :
(countable) Any of various lycaenid butterflies of the Eurasian genus Miletus.