
Passoã is a French passion-fruit liqueur built on real passion fruit, with a deep carmine-red color.
Passion fruit with sugar at about 17%, so a rebuild needs a syrup and a spirit rather than a bottle: roughly equal parts lands on the strength. The deep red is coloring, and without it the drink comes out pale.
Passion fruit liqueur (generic)
Passoã is one brand inside the category, and others run both sweeter and paler. The color of the drink will almost certainly shift and the sweetness can go either way, so taste the bottle before you measure.
The color here is added, and light is what destroys it, so the enemy is the sun and not time. Keep it out of the sun. The passion fruit note fades on the usual fruit-liqueur schedule.

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Pornstar Bellini
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Passion Fruit Spritz
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Hot Passion
Vodka, Passoã passion fruit liqueur