The phrase "delicate sweetness" is correct and usable in written English.
You could use it to describe a subtle flavor, such as a light and gentle sweetness in a dessert or drink. For example, "The dessert had a delicate sweetness that was perfectly balanced with the tartness of the lemon."
The potatoes were richly nuanced and very fragrant with a delicate sweetness intensified by the roasted garlic.
But late-harvest Thompson seedless grapes, the workhorse green table variety, are still mighty pretty and have a delicate sweetness.
In Uganda, they feasted on queen termites, which are fatty – like little sausages – with the texture of sweetbreads, the fragrance of foie gras and a delicate sweetness.
Steamed mandarin fish with onion oil (cong you qing zheng gui yu) was masterful, with the delicate sweetness of the fish fillet accentuated by the flavored oil.
Whisper-thin, jicama ravioli wrappers contrasted appealingly with the creamy filling, and their fresh, delicate sweetness was delightful with the lively, tart and tangy sun-dried tomato-hazelnut Romesco sauce.
It wilts quickly, in about the same amount of time it takes the peas to cook through, and, as long as you don't overcook it, it contributes a delicate sweetness to the pasta.
No, if sufficiently thin and delicate, the sweetness of a pancake is uniquely suited to a creamy seafood filling.
The process leaves the mirin- and soy-marinated flesh moist and infused with a delicate, earthy sweetness.
Yet it can be made seasonal with the delicate spring sweetness of strawberries, and summery with the tropical tang of limes.
To balance the heartiness of the main course, reindeer, each cut was topped with an ultra-thin slice of apple (for an iota of acidity) and dime-sized disk of jellied woodruff (for a very delicate herbal sweetness).
Nothing can be done to improve upon the raw oyster, the ultimate simple food, but Mr. Zamarra makes a good case for an alternative, allowing a brief exposure to heat and wood smoke, plus some butter, lemon and thyme, to amplify the mollusk's delicate, briny sweetness.
