The phrase "a sweet bit of" is correct and usable in written English.
It can be used to describe something that is enjoyable or delightful, often in a lighthearted or affectionate manner.
Example: "After a long day, I treated myself to a sweet bit of chocolate cake."
Alternatives: "a delightful piece of" or "a lovely morsel of".
It was a sweet bit of hurling, and Mets fans were loudly appreciative.
Quick Calls Ice Jewelry (free on Apple) is a sweet bit of shopping software from the online retailer Ice.com.com
Then the drums pick up, and Mascis's guitar takes off on a fun ramble that ends in a high tweet-tweet, a sweet bit of humor.
It's a sweet bit of repartee but it also demonstrates the profound and often overlooked changes, in sexuality apart from anything else, that partners of trans people also undergo.
Free of charge, sure, but it's a sweet bit of leverage to have on the other guys.
That the victims are, for now, Wall Street bankers—some of the least sympathetic human beings around—is a sweet bit of irony.
Winners like yellow-tomato gazpacho soup, a real zinger with sweet bits of watermelon and crab meat, seem to be offset by the very strange shrimp toast, a sort of crostini with damp shrimp sludge heavily applied.
Brisk lashings of purity between sweet bits of sin.
I always used to feel awkward when asked to choose between salted or sweet ("A bit of both please, but not in layers, it needs to be mixed together. If that's not too much trouble").
EP, or at least on some of the tracks, like Haim did when they first emerged, with a sweet (plus a bit of grit) fusion of R&B and country.
The dark, sweet soy sauce is a splash, an accent, breaking through the lush music; It all comes together on a plate -- a sweet and savory bit of heaven from another culture, another time decades past, speaking to you in the present.
