From the cartoon of the same name.
Written by Mack David, Al Hoffman and Jerry Livingston.
Musical Arrangement by Paul Smith
Vocal by The Mellomen

Originally written in 1948 for The Adventures of Ichabod and Mr. Toad, but went unused.

Lyrics:
Trick or treat, trick or treat
Trick or treat for Halloween!
Better give a treat that's good to eat
If you wanna keep life serene.

Trick or treat, trick or treat.
Trick or treat the whole night through.
Little scalawags with fiendish gags
Can make it tough on you!

Your little white house turns green,
Your little white house turns green,
Your little white house turns green!
Every post is a ghost if you got a witch's brew.
And if you want your gate to circulate,
Oh-ho! We can do that too!

Trick or treat, trick or treat
Trick or treat for Halloween!
When ghosts and goblins by the score
Ring the bell on your front door,
Better not be stingy or your nightmares will come true!