I believe it was pronounced with a T centuries ago, but that fell out of favor. Recently the T has been revived as have other “spelling pronunciations”. It’s interesting that no one I’ve heard ever pronounced soften with a T, but it’s not like there’s a lot of consistency in English pronunciation anyway.
I used to say off ten. Then I read that that was wrong, and it should be off en, so I made a point to say it that way. Then I read that, no, off ten was also acceptable.
Even the cites at the YourDictionary page for often don’t agree that pronouncing the “t” is wrong. Click on “See often in American Heritage Dictionary” and read the usage note:
My best friend pronounces the T and I know it’s because he’s bad with language (math whiz, English dunce). I know it’s “acceptable” to say it with a T but it drives me nuts that he does it because I know he’s hypercorrecting like Dr. Drake says.
I also get annoyed at the trend of people responding to “how are you?” with “I’m well” as I find that to be hypercorrecting too. But that’s another thread
I say OFFEN, my wife says OFF-TEN. It appears that my kids say it like their mother, at least I’ve never noticed them saying it like me. But I tease her that her pronounciation of this word and some others, like chaw-clit and skoo-wool, is because of her hick north New Jersey upbringing.
I’m not really shocked by the concept of linguistic variation.
The OED says: “Often is less commonly used than oft until the 16th cent. Several orthoepists of the 16th and 17th centuries, including Hart, Bullokar, Robinson, Gil, and Hodges, give a pronunciation with medial –t–. Others, including Coles, Young, Strong, and Brown, record a pronunciation without -t-, which, despite its use in the 16th cent. by Elizabeth I, seems to have been avoided by careful speakers in the 17th cent. (see E. J. Dobson Eng. Pronunc. 1500–1700 (ed. 2, 1968) II. §405). Loss of t after f occurs in other cases; compare soften v., and also raft n.1, haft n.1, etc. The pronunciation with -t- has frequently been considered to be hypercorrection in recent times: see for example H. W. Fowler Mod. Eng. Usage (1926), s.v.”
So there you have it. If you say -t-, you’re well within your rights and following Good Queen Bess. You might want to pronounce “has” and “does” with a final -th sound, too. But you’re in good company, and it’s language, so you’re not wrong.