The difference between Brownie and Elf

Brownie as a noun (culinary):

A small square piece of rich cake, usually made with chocolate.

Brownie as a noun (folklore):

A mythical creature, a helpful elf who would secretly do people's housework for them.

Brownie as a noun (paganism):

A household spirit or revered ancestor.

Brownie as a noun (Australia, New Zealand, colloquial):

A tall, long-necked beer bottle, made from brown coloured glass.

Brownie as a noun (ethnic slur, offensive):

A person of Arab, Indian or Hispanic descent. Also rarely used for a Native American or Pacific Islander.

Brownie as a noun (US):

A girl in the first level of girl scouts.

Elf as a noun (Norse mythology):

A luminous spirit presiding over nature and fertility and dwelling in the world of Álfheim (Elfland). Compare angel, nymph, fairy.

Elf as a noun:

Any from a race of mythical, supernatural beings resembling but seen as distinct from human beings. They are usually delicate-featured and skilled in magic or spellcrafting; sometimes depicted as clashing with dwarves, especially in modern fantasy literature.

Elf as a noun (fantasy):

Any of the magical, typically forest-guarding races bearing some similarities to the Norse álfar (through Tolkien's Eldar).

Elf as a noun:

A very diminutive person; a dwarf.

Elf as a noun (South Africa):

The bluefish, Pomatomus saltatrix.

Elf as a verb (now, _, rare):

To twist into elflocks (of hair); to mat.