Try to steal my cookie.

No thanks. I got OVER 9000!!! cookies already.

This cookie just so happens to be the only cookie in the world -- all OVER 9000!!! cookies that you have immediately disintegrate. So does every cookie recipe in the world and all cookie dough.

So there.

Try to steal my cookie.

I take it from your hand, and n0m it.

Well, looks like you took his cookie.
How do you sleep at night

Ah, but you must have forgotten how those recipes have been created.
I make some cookie dough from scratch and make a cookie.

Ah, but you didn't remember the recipe correctly, so the finished cookie is so inedible that you get food poisoning and die.

It doesn't matter, because I still have a cookie sitting in my stomach.

I drug you, take you to my basement, cut you open and take out the cookie. While I'm there, I take a kidney, sell it, and use the monies to buy another cookie. I now have two.

But remember? There are no other cookies.

I use a grappling hook to take the cookie by surprise. Batman-style.

I happen to be a Batman-fangirl. I know your tactics, and am able to take the cookie back.

My cookie.

Hahahaha! I make cookie fakes (yes, it's legal, because it's not a cookie) and swap it with your cookie.
My cookie now.

I use what knowledge I have of blender to create a weird-looking world made mostly of gray cubes, and trap you in it. ctrl-c ctrl-v: (some mod, please make this link a picture)

I kill whoever has the cookie, take the cookie, evaluate what was in the cookie, make more cookies and share them with everyone.