I came across this recipe, and it's the same as my personal martini recipe, except that I use a different dry vermouth and I make a smaller 45 ml/22.5 ml cocktail. Grapefruit bitters make a huge difference in this drink. I've used orange bitters, of course, and I've tried lemon bitters, but grapefruit bitters provide a much smoother, more drinkable result.
Refreshing with the subtle tang of gragefruit adding an exciting and original dimension to a wet Martini. In the absence of Rutte, I used Plymouth Gin which seems to work well in Martinis, as an alternative.