It's rich in both colour and flavour. Don't scrimp on the quality of raspberry jam; use three flat barspoons (15-20ml). Sasha's original recipe specifies...
Regarding Cocktails author weighing in here. Noticed that the recipe specs are off for this drink. Three bar spoons of jam would make this drink entirely too sweet. Sasha's Cosmonaut (which I pulled from the original Milk & Honey spreadsheet of recipes and included in Regarding Cocktails), calls for "a heaping bar spoon of raspberry preserves. The book also calls out that the jam of choice for this drink was always Bonne Maman.