For one serving of Amaretto Sour:

• 80 grams Amaretto

• 70 to 100 grams freshly squeezed lemon juice (use 60 to 65 grams if you prefer it less sour). The 70 to 100 depends on how sour you like it. I tend  to go between 70 to 90 depending on the day and how much lemons I have.

• 1 teaspoon of homemade orange simple syrup (you can add a quarter to half a teaspoon more if you like it sweeter)

• 34 grams egg white (or the white of one large egg)