
Crème de framboise is a sweet, rich raspberry liqueur of berries macerated in spirit. "Crème" here refers to the high sugar, not to cream.
Raspberry with a lot of sugar at about 18%, so a rebuild needs a syrup and a spirit in roughly equal parts. Concentration is the variable: an ordinary fruit liqueur is thinner and the drink comes out paler and less sweet.
Regular raspberry liqueur
A plain raspberry liqueur carries less sugar — "crème" in the name means the sugar load, not dairy. The drink comes out drier and thinner: add roughly a barspoon of syrup per measure.
Raspberry fades faster than almost anything else on the liqueur shelf. The color goes first, then the fresh top note, leaving sweetness and a vaguer berry behind. Refrigerate after opening and plan on months rather than years.