The phrase "a layer of soft" is not correct as it is incomplete and lacks a noun to follow "soft." You can use it when describing a layer of something that is soft, but it needs to be completed with a noun.
Example: "I added a layer of soft fabric to the quilt for extra comfort."
Alternatives: "a layer of plush" or "a layer of gentle".
Dominique Ansel has them emerging from real eggshells, with a layer of soft, rich caramel at the bottom.
Right now, I'm working on a rich buttery shell with a layer of soft caramel topped with dark chocolate ganache and pink Himalayan salt.
It was a hollow aluminum pillar with a layer of soft lead and a steel stylus attached to it so people could write into the pillar.
Go with the bread pudding, in which a layer of soft, creamy, ever-so-slightly salty fromage blanc is topped with a soft, sweet-bread pancake, which in turn is covered with a sour, lemon-scented ice cream.
He was in good health, as it happened, a little heavier than he might have been, but nevertheless... His roundish, scholarly stomach was covered with a layer of soft, dark hair, his hands and nails well cared for.
The echoes may also show other objects, such as schools of fish, or they may reveal the dual nature of the bottom, where a layer of soft mud may overlie rock.
Her hands had acquired a layer of softer but more highly charged air than that in the rest of the atmosphere; they had their own opinion.
The summit of Everest itself is covered by rock-hard snow surmounted by a layer of softer snow that fluctuates annually by some 5 20 feet (1.5 6 metres); the snow level is highest in September, after the monsoon, and lowest in May after having been depleted by the strong northwesterly winter winds.
The audio readings suggest that there is a layer of softer material covering a harder, icy interior.
The photographer saw the city through a layer of shimmering soft focus.
The French painter Pierre Bonnard was a key influence, and Leiter saw the city's streets through a Neo-Impressionist lens, often with a shop window or a mirror to provide a layer of shimmering soft focus.
