"a welcome touch" is a correct and usable term in written English.
You can use it when you want to describe something that you find pleasant or enjoyable, such as when something adds a special effect that makes something even better. For example, "The light shining through the window was a welcome touch that made the room feel more cozy."
And you finish it with homemade croutons, a welcome touch.
An open terrace near the rear parking lot is a welcome touch in warm weather.
(A welcome touch, if not exactly Middle Eastern, is basmati rice in place of white).
However, Britain's dropping of the AfPak concept does bring a welcome touch of realism.
The kitchen also has a light hand when it comes to oil — a welcome touch with this cuisine.
The house salad, served family-style, was a welcome touch of green in an otherwise monochromatic palette.
Bodie and Fou bodieandFou.com There's a stylish Scandi aesthetic to the products at Bodie and Fou with the odd quirky touch that adds a welcome hint of eccentricity as well.
In 1966 he was assessor to Lord Mountbatten during his inquiry into prison security – but he harboured a sneaking regard for Ronnie Biggs, the great train robber who escaped from Wandsworth jail in 1965, saying that his flight "added a rare and welcome touch of humour to the history of crime".
He observed in his memoirs that Biggs had "added a rare and welcome touch of humour to the history of crime", and suggested that his time in Brazil meant that he was the most memorable figure to undergo banishment since Henry Bolingbroke, the future Henry IV, in 1398.
Conversely, Laura Miller of Salon called the isolation a distinctive and welcome touch.
French-Vietnamese beef salad, neither appetizer nor entree, delivers strong currents of flavor from several directions: greens with a gentle soy vinaigrette, garlicky grilled beef and an unexpected but welcome touch -- grilled, faintly sweet French bread.
