Why did my no-bake cheesecake not set?

There is nothing in a no-bake cheesecake that sets by cooking. It holds up because whipped cream provides an aerated structure, because full-fat soft cheese and butter are solid at fridge temperature, and — in some recipes — because gelatine has formed a gel. Every failure traces to one of those three, and the commonest by a distance is a low-fat soft cheese: it carries more water and less fat, so there is simply less to become solid in the fridge.

What you'll need

• Full-fat soft cheese
• Double or whipping cream
• A springform tin

Step by step

1. Wait longer before deciding.Six hours is the practical minimum and overnight is better. A cheesecake that is soft at four hours has often set completely by morning. Do not tip it out early.
2. Check what cheese you used.Full-fat soft cheese only. Light, extra-light and spreadable-tub versions have more water and less fat, and many will not set at all. This is the single most common cause.
3. Check how the cream was whipped.Double or whipping cream taken to soft peaks, then folded in — not poured in liquid. Single cream will not whip at all. See `whip-cream-and-egg-whites`.
4. Check for over-beating.Beating the cheese and cream mixture too hard breaks the cream's structure and it goes soupy and grainy. Beat the cheese smooth first, whip the cream separately, then fold the two together gently.
5. Look at what acid or liquid went in.Lemon juice thickens a cheesecake by acidifying the cheese, but a large volume of liquid — fruit purée, coulis, melted chocolate that has seized — dilutes it. Reduce fruit purées down before adding them.
6. If the recipe used gelatine, check it dissolved.Undissolved gelatine sets nothing. It must be bloomed in cold water, then dissolved fully in warm liquid, then mixed into a mixture that is not cold enough to make it seize into strings. See `use-gelatine-and-setting-agents`.
7. Decide whether to rescue or repurpose.A slightly soft cheesecake can be firmed by scraping the filling back into a bowl, whipping fresh cream to soft peaks and folding it through, then re-chilling. A genuinely liquid one is a very good pouring cream over the crushed base, served in glasses.

Tips

• An hour in the freezer before serving firms a borderline cheesecake enough to slice cleanly, and it thaws to the right texture on the plate.
• Warm the outside of the springform with a hot cloth for thirty seconds before releasing the clip. It frees the edge without dragging the filling.
• Baked cheesecakes set by egg protein and are a different problem entirely. See `stop-cheesecake-cracking`.
• Gelatine is not vegetarian. Agar sets much more firmly and must be boiled to activate — it is not a spoon-for-spoon swap.

Common mistakes

• Using light soft cheese to make it healthier — The fat is the setting agent. Removing it removes the mechanism, and no amount of chilling compensates.
• Beating everything together in one bowl with a mixer — The cream needs whipping separately and folding in. Beaten together, the cheese's weight stops the cream aerating and then over-beating breaks it.

If it doesn't work