Whip up your aquafaba into a light, frothy mixture.
To do so, add the aquafaba to a mixing bowl and beat with an electric mixture. It takes about 5 minutes to form a foamy, stiff mixture.
While that's whipping up, make a quick strawberry purée by blending together ½ cup of fresh stawberries and ¼ cup of water.
You can also use defrosted frozen strawberries. For remove the seeds, you can strain through a fine mesh sieve, but it's not necessary.
Fill a cocktail shaker with ice. Pour in pisco, strawberry puree, lemon juice, simple syrup and (optional) elderflower liqueur.
Add in 2 tbsp of whipped aquafaba and shake vigorously.
Pour into a chilled glass, then top with more aquafaba and a few dashes of angostura bitters.
Enjoy!