Thomas J. Story
To make 8 cups sunflower orgeat: Blend sunflower seeds in a blender or food processor until fully minced, about 5 minutes. In a medium saucepan over medium-high heat, boil the water, sugar, and salt until dissolved. Add the sunflowers and orange flower water, and simmer for 10 minutes. Strain with a strainer and cheesecloth into a separate bowl. Let sit until it reaches room temperature.
To make 4 cups of cinnamon bitters, combine 1 qt. Angostura bitters and ½ cup cinnamon chips in a sealable container. Let sit for 24 hours, then strain into a sealable bottle or container.
To assemble the cocktail, add all ingredients to a cocktail shaker and shake without ice to emulsify the egg white.
Add ice and shake for 10-20 seconds.
Double strain into a coupe glass. Garnish with matcha powder.