Your first question may be, “Why is this called a White Negroni when it is clearly yellow?” To that I would answer: ¯\_(ツ)_/¯
My only guess is that this was probably created in a dimly lit bar and they simply couldn’t tell that it was yellow. Unlike the classic Negroni, we actually don’t know too much information about its origins and there certainly aren’t any mustachio’d counts involved.
Regardless, this fairer version of the darker Negroni hits some of the same notes, but with a decidedly drier taste.
2 oz gin
1 oz Lillet Blanc
¾ oz Suze
Add all ingredients to a mixing glass with ice and stir well. Strain into an ice-filled rocks glass and garnish with a lemon peel.
As you can see, it also doesn’t adhere to the Negroni’s equal ratios formula, because too much Suze can dominate the other flavours. Keeping the gin the same, using the floral Lillet Blanc in place of sweet vermouth, and finally the gentian root-based Suze in place of Campari, et voila!