I will bring John Cena (You can't see me" )and steal the cookie 

Smart!

I'll hire a thief and steal the cookie. :P

I will offer you a cookie and steal your cookie (keeping mine, of course).

I will read you a bedtime story  and steal the cookie .

I will become your girlfriend/.boyfriend and steal it from you(you can't deny me) 

I'll shine a light in your eyes and steal the cookie :D

I will freeze the room included you and steel the frozen cookie

*thaws*

I'll spray perfume on you and steal the cookie

I will set a fire and when you get away from it I will steal with my fireman's suit the cookie. 

I will hire a lawyer and sue for not giving my cookie

I'll send a fake warrant and while you're reading it, I'll steal the cookie

I will mix  Dulcoflex in your drink and while in you are in washroom ,I will steal the cookie

I will take you on vacation and I will steal the cookie while you are on the beach.

I'll throw your phone into the wall and steal the cookie <

 VxV467:

I'll throw your phone into the wall and steal the cookie <

haha 

I will take you to spa and steal the cookie