Panna Cotta Gelatine Calculator

For a standard panna cotta that holds its shape with a gentle wobble, use 2 platinum gelatine leaves per 250ml of liquid (so a 500ml batch needs 4 leaves — the same quantity Dr Oetker quotes to set a pint). For a softer set that barely holds, use 1.5 leaves per 250ml; for a firmer panna cotta that unmoulds cleanly, use 2.5 leaves per 250ml. Each serving is approximately 125ml, so a standard 500ml batch makes 4 panna cottas.

You need MORE grams of powder than the raw weight of the leaves, because powdered gelatine has a lower bloom (gelling) strength than platinum leaf. Dr Oetker states that 4 of its platinum leaves (1.7g each, 250 bloom) are equivalent to approximately 12g of powdered gelatine — about 3g of powder per leaf, not 1.7g. Simply matching the leaf weight (4 leaves = 6.8g) would under-dose the powder by roughly 40% and the panna cotta may not hold its shape. Leaves themselves come in grades (bronze, silver, gold, platinum, titanium) with different weights and bloom strengths, but they are interchangeable by count — you use the same number of sheets whatever the grade.

The most common reasons are: not enough gelatine, boiling the liquid after adding gelatine (which destroys its setting power), or using fresh pineapple, kiwi, papaya, or figs which contain enzymes that break down gelatine. Always dissolve gelatine in warm (not boiling) liquid, and if using those fruits, cook them first to deactivate the enzymes. Panna cotta also needs at least 4 hours in the fridge to set fully.

Traditional panna cotta uses a mix of double cream and milk (typically 2:1). You can substitute with all milk for a lighter result, coconut cream for a dairy-free version, or buttermilk for a tangy flavour. If using a lower-fat liquid, you may want slightly more gelatine as fat helps the set feel smoother. Coconut milk panna cotta works particularly well.

Use a slightly firmer set if you plan to unmould. Lightly oil the moulds before filling, or briefly dip the base of each mould in hot water for 5-10 seconds, then invert onto a plate. You can also run a thin knife around the edge first. If you are serving in glasses, a softer set with a gentle wobble is more elegant and does not need unmoulding.