There's essentially two types of "gin fizz" cocktails. Those with cream and those without. Both have egg white and both are delicious, but you'll be amazed at how different they are.
The Ramos Gin Fizz is a classic New Orleans cocktail that was invented in the 1880s by Henry Ramos. The original instructions called for 12 minutes of shaking time - needless to say, there were some seriously sore arms among those bartenders.
While we're not going to shake this thing for 12 minutes, it does require some serious shaking. The key to making it work is shaking twice. First, a dry shake without ice to help emulsify the ingredients and incorporate air and second, a shake with ice to add even more air and chill the cocktail. Both of these should be downright violent shakes, each lasting well over a minute.
To make this unique, we're adding a little lavender bitters. A common ingredient that appears in gins, lavender really sets this off. If you don't have lavender bitters, just make it without - it will still be a damn good drink. You'll want to use a good, strongly-flavored gin like Edinburgh Gin for this one so the flavors come through the egg white and cream.
fine mesh strainer
2 oz Edinburgh Gin
.75 oz heavy cream
.75 oz simple syrup
.5 oz fresh-squeezed lime juice
.5 oz fresh-squeezed lemon juice
1 egg white
3-5 drops orange flower water
1 dash lavender bitters
1.5 oz club soda, chilled
a few dried lavender buds for garnish (optional)
Add all ingredients except seltzer and garnish to a cocktails shaker (without ice!) and dry shake for at least one minute. When your arm gets tired, switch sides and shake again. When you think you're done, you're not...keep shaking. Then add ice and shake again...hard. Keep shaking. Don't stop. Okay, now you're done.
Double-strain into a chilled collins glass and let settle for minute before topping with club soda. Sprinkle a few lavender buds on top.