A sack of pumpkins collected at the summer solstice
A bale of deadly nightshade mashed at the winter solstice
A mixing bowl of dead man's fingers picked after an extravagant tea
Crushed beard of cow
A sprig of rose petals tickled on Midsummer's morn
A boot of hemlock picked on Beltane night
Scald in the cauldron with a jar of marmite.
Induces small animals to turn into ballerinas, and makes the local ogre dance around the maypole making dirty jokes.