I say “sherbert” & “wash”. So does everyone I know.
Sher-but. Probably a glottal stop on the t.
Sherbet. And I once had a big fight with my dad over the pronunciation of turmeric, which he thought was pronounced tumeric. I won.
I’m from New Jersey. I say “sherbert” but not “warsh.” (The “extra” r in sherbet is not in an environment where you would get an extra r like in “warsh” anyway.)
And sorbet (which I pronounce “sorebay”) is a different thing. Sherbet has dairy, sorbet does not.
Same here. No clue where that second R came from.
Then again, I grew up waRshing things (hell, I raised my hand in first grade and asked Sister Reparate if she hadn’t forgotten the R in the word she’d written on the board). I got better.
Sure bert.
Sherbet is a misspelling IMO. They forgot to put in the “r”. That doesn’t mean that the word has to be pronounced incorrectly too.
I’m from Chicago and we always said “sure-bert.” I was an adult before someone ever corrected me and I was amazed that I had never heard it pronounced any other way. Of course that was in the 70s and early 80s before it became “posh” to pronounce things correctly 
Same here when I was growing up. I switched the day I actually saw the word and realized there was no second R.
I used to call it sher-burt until I learned its proper spelling in grad school sometime.
Sherbet, but it probably sounds closer to sherbit. No second r.
OP, do you say sahmon or sallmon?
tee-a-wanna
Two things I’m forever telling Thais: The L in “salmon” is silent, and so is the S in Illinois.
Sherbet, no second “R”; sorbet is pronounced in the French fashion, as it’s merely French for sherbet. Although we Americans usually mean something like Italian ice when we say “sorbet,” it’s legally interchangeable with “sherbet,” which contains dairy, but less than ice cream.
And that’s “sammon” and “tee-huana” where I’m from.
Sammon and tee-a-wanna.
Count me in as among those who pronounced it “sher-bert” until they realized there actually was no second r. Grew up in Georgia, if that makes a difference.
And it’s not AR-Kansas.
In our house we say, “Schubert.” We are a little odd.
Just like it’s spelled: sherbert.
Shrbut. Rhymes with put, except not stressed on last syllable
Shrbet if I’m trying to speak distinctly
I avoid saying it if at all possible, not that the locals would see anything wrong with my saying “sherbert.” It is bad enough that my dear sister mocks me for sticking an “r” in “wash” even though I very carefully do not.