2oz gin
1/2 oz 2:1 simple
1/2 lemon juice
3oz bubbly
I did mine with 1.5 of Weller. Much better, as the Sorrel was rather overpowering at 1oz. whiskey.
I might prefer to cut back on the Grand Marinier a bit. Maybe 1 oz or 1/4. Otherwise, it's a wonderful variation of one of our favorites.
The three coffee beans really make a difference; I almost ignored them...don't!
The adjusted receipe may be a bit less spirit forward, but my thought is about 2.5ml of simple.