Separate the egg and put the egg white in your shaker. The yolk can be used for other things, so remember to save it.
Pour the schnapps into the shaker.
Add the sambucca to the shaker next.
Add your raspberry syrup to the shaker.
Pour in the lemon juice.
Finally, add a dash or two of your bitters.
Put a lid on the shaker and shake it well without ice (dry shaking). The reason for doing it without ice cubes first is that the cold will cause the egg whites to clump.
Fill a glass with ice cubes. The more ice cubes, the less they will melt and water down your cocktail. So don't just use 1-2 ice cubes to avoid dilution; you will get the opposite effect.
Add ice cubes to your shaker and shake well again.
Pour it through a strainer into the glass.
Add freeze-dried raspberries on top and serve immediately.