The second squadron, from wisconsin bartender eric hay, tastes like a morning stroll through a citrus orchard, with fresh lemons and grapefruits bursting from leafy green trees. Hay calls for crme yvette, a unique and hard-to-find liqueur flavored with red berries, orange peel, vanilla, and violet petals. Theres no real substitute for it but if all you have is a decent raspberry liqueur, your second squadron will still be absolutely delicious.