Among varieties of cheesecake, the lemon version registers as the lightest. That impression comes from the chemical effect of the lemon.
How does lemon change the texture?
The basic structure of cream cheese rests on casein proteins.
Those proteins sit dispersed at a neutral pH.
Adding acid brings the protein chains together and forms a network.
That is the same reaction as coagulation in cheesemaking.
The result is a firmer mixture.
Lemon cheesecake therefore gains a firmer texture than the plain version, and the edges of a slice stand more sharply when cut.
| Measure | Lemon cheesecake | Plain cheesecake |
|---|---|---|
| Lemon juice (per kg cheese) | 60-90 ml | None or 10 ml |
| Lemon zest | 2-3 lemons | None |
| pH of the mixture | 4.8-5.2 | 5.6-6.0 |
| Texture | Firm, defined | Soft |
| Risk of cracking | High | Medium |
| Perceived weight | Light | Heavy |
How much lemon goes in?
The quantity is critical for both taste and texture.
Sixty to ninety millilitres of lemon juice per kilogram of cream cheese.
That means two or three lemons.
The zest of two or three lemons goes in alongside.
Above ninety millilitres the acid rises and the mixture over-coagulates, leaving a grainy texture.
Below sixty the lemon aroma stays in the background and the product cannot be told from a plain cheesecake.
What separates the zest from the juice?
The two components serve different functions.
The juice provides acid; it takes charge of the coagulation and the balance of taste.
The zest carries volatile oils; most of the aroma comes from there.
A cheesecake using juice alone stays sour but without aroma.
One using zest alone is aromatic but behaves like a plain cheesecake in texture.
Used together they deliver both acid and aroma; the grating stops before the white pith, since that region gives a bitter taste.
How do the baked and unbaked versions differ?
Two methods exist.
A baked cheesecake cooks in a water bath in the oven; forty-five to fifty minutes at a hundred and sixty degrees.
The eggs add structure to the mixture and set during baking.
The unbaked version uses gelatine, or the coagulating effect of the lemon juice itself.
It chills four to six hours in a fridge.
Lemon cheesecake works more easily in the unbaked version; because the lemon juice already coagulates, the quantity of gelatine can fall.
Why does it crack?
That is the classic problem of a baked cheesecake.
The mixture expands in the oven.
It contracts as it cools.
Because the edges cling to the tin the centre pulls and the surface splits.
The risk runs higher in the lemon version, since acid compresses the proteins further.
The answer is a water bath; hot water goes into the oven tray and the moisture stops the surface drying fast, while the oven door stays ajar for slow cooling.
How does the base get made?
The classic base is biscuit and melted butter.
Two hundred grams of biscuit and eighty of butter.
The biscuit gets ground fine and mixed with the butter.
It gets pressed into the tin and baked ten minutes.
Lemon zest joins the base too in the lemon version; a teaspoon of grated zest makes the base carry aroma as well and the product becomes coherent as a whole.
How does a cheesecake get cut?
The cheesecake gets cut once cooled completely.
It waits at least four hours in a fridge.
A long, thin knife gets used.
The knife goes into hot water and gets dried after every slice.
The cut happens in a single vertical stroke.
Thanks to its firm texture, lemon cheesecake cuts more cleanly than the plain version; the edges of a slice stay defined and it does not collapse on the plate.
How does lemon cheesecake get stored?
It stays in a fridge in a closed container.
Four or five days.
The acid of the lemon has a mild preserving effect; lemon cheesecake keeps a day longer than the plain version.
Freezing works; wrapped singly, the slices hold two months.
Thawing happens in a fridge.
Cheesecake is among the desserts best suited to freezing; its high fat keeps the ice crystals small and the texture barely changes after thawing.
Which cream cheese goes into a cheesecake?
The choice of cream cheese determines both the texture and the reaction with acid.
Full-fat cream cheese suits best; its fat runs 30 to 35 percent and it gives a stable structure in the oven.
Reduced-fat products carry more water; they release it in the oven and the cheesecake collapses.
Labneh gets used too, though its structure is looser and starch has to join the recipe.
Ricotta gives a different texture; grainy and lighter, and Italian-style cheesecake gets made with it.
The cream cheese goes in at room temperature; cold from the fridge it clumps and lumps stay in the mixture.
The mixing runs at low speed; whipped fast the mixture takes in air, rises in the oven and then falls.
That is the second most widespread cause of cracking.
What goes on top of a cheesecake?
Lemon cheesecake can go out plain, though a topping contributes both appearance and taste.
Grated lemon zest is the simplest option; it refreshes the aroma and gives a visual accent.
Lemon curd; it raises the acid and creates a glossy yellow surface.
Raspberries; acidic fruits pair well with lemon.
Grated white chocolate raises the sweetness and pulls the balance away from the lemon.
Icing sugar goes on at the moment of service; dusted early it draws moisture and disappears.
