Make a cookie disappear? Permanently? Temporarily? Hmm.
Tory thought about this for a while and then decided upon using her wand. She pointed it at one of the cookies and said: "Parvus Bombarda". There was a small explosion on her desk leaving behind a small pile of ashes.
She smiled to herself. The smaller version of the 'Bombarda' spell still worked, she blew up an apple with it seven years ago. Not on purpose pf course.
Then she pointed her wand at the second cookie. "Reducio." she murmured. The cookie shrunk down until it was only the size of a dust particle.
She smiled, satisfaction written all over her face.