Its not ketchup or mustard, or pickles or onions or lettuce or tomato. Its peanut butter.

While I respectfully disagree, the best hamburger topping is certainly different for us all. Glad you found one that is perfect for you!

I always thought the best hamburger topping was the other half of the bun.

I often use Miracle Whip on a burger. I used to like peanut butter on pizza years and years ago and people thought I was nuts. This is long before the Thai style pizza came out. I've never tried it on a burger. There are dishes that use a peanut butter sauce that I like so I think a burger would be okay.

I never would have thought of peanut butter.
Caramalised onion is essential for me.

I've never had peanut butter on pizza. I've had other Thai food wihth peanut butter. I tried peanut butter on a hamburger at a local restaurant and that's how it became my favorite. Its messy though and so not goof if you are in a hurry.