Whipped cream holds its shape when fat globules surround air bubbles. Over time, this structure loosens and the water trapped between them drains downward; the foam sinks, and water pools on the plate. The process speeds up as the temperature rises. To keep whipped cream upright for longer, use binders such as powdered sugar, melted gelatin, or mascarpone, and keep the cream cold until serving.
Whipped cream is not a stable structure. Fat globules cling to one another around air bubbles to form a framework, but this framework holds water only temporarily. Over the course of hours, the globules shift, gaps open, and gravity pulls the water downward. The foam loses height, and a thin layer of liquid gathers along the edge of the plate. This is unavoidable; all you can do is slow it down. As the temperature rises, the fat softens and the process speeds up. For the same reason, do not whip cream in advance and leave it for use after one day.
The simplest binder is powdered sugar. Its starch binds free water and delays the foam's release of liquid; using powdered sugar instead of granulated sugar buys a few hours on its own. Add the sugar near the end of whipping, when the cream reaches soft peaks. Sugar added at the beginning slows the rise. This method is enough for short-term use, but it is not sufficient on its own for a cake that will sit overnight. The starch content of powdered sugar varies by brand, so its effect varies from brand to brand.
A stronger method is gelatin. Bloom a small amount of powdered gelatin in cold water, warm it to dissolve, and let it cool until it feels lukewarm to the touch. When the cream reaches soft peaks, pour the gelatin in a thin stream while the mixer is running, then continue whipping briefly. If the gelatin is poured in while hot, it thins the cream; if it is cooled too much, it sets into strings and remains in pieces in the foam. Keep the amount small, too: too much gelatin turns the cream from a foam into a firm gel.
A third method is to add dairy. Mascarpone, labneh, or cream cheese increases the cream's fat content and strengthens its framework; it also adds richness. Soften the cheese first in a separate bowl, then add it to the cream a little at a time. Cheese added directly to cold cream forms lumps. Powdered milk is used in a similar way and is a practical option because it does not add water to the cream. The cheese mixture is a little heavier, so choose a slightly wider piping tip when using a pastry bag.
A few rules stay the same even when using a binder. Do not overwhip the cream; a foam that has lost its shine and started to look grainy is already past its ideal point. Keep cakes in the refrigerator until serving, and do not leave them uncovered in a warm place for a long time. Place ingredients that release water, such as fruit, on top of the cream at the last minute; fruit added earlier releases its juice into the foam. If the cream around the edge of the cake needs smoothing, do that close to serving time, because every touch compresses the foam.
Comments (3)
Jelatini ele ılık gelecek kadar soğutmadan ekledim, krema pütür pütür oldu. Uyarı boşuna değilmiş. Sonradan öğrendim ki jelatini önce birkaç kaşık kremayla karıştırıp sonra bütüne katmak da aynı sorunu çözüyor, sıcaklık farkı böyle kademeli kapanıyor.
Pastayı bir gün önceden hazırlamam gerekiyor, jelatinli krema ertesi güne dayanır mı?
Dayanır, buzdolabında iki gün formunu koruyor. Yalnız kesme anında biraz daha diri olacağını hesaba katın.