Stovetop Lemon Curd
The secret to a stable curd is patience at the stove. If you rush the heat, you end up with scrambled eggs; keep it low and steady, and you will have a bright, velvet-textured spread.
Watch the temperature, not the clock.
The curd is finished when it thickens enough to hold a line drawn through it on the back of a wooden spoon. Keep the heat strictly at a simmer so the eggs don't curdle.
- Medium heat-proof bowl
- Small saucepan
- Whisk
- Fine-mesh sieve
- Silicone spatula
What goes in.
- 3large lemons, zested and juiced (about 1/2 cup juice)
- 1 cupgranulated sugar
- 3large eggs
- 1large egg yolk
- 6 tbspunsalted butter, cubed and chilled
Mastering the double boiler
By cooking over steaming water rather than direct heat, you provide the gentle, indirect energy needed to thicken the eggs without turning them into solid curds.
The method.
Prep the boiler
Fill a small saucepan with an inch of water and bring to a simmer. Place your heat-proof bowl over the top, ensuring the bottom does not touch the water.
Combine the base
Whisk the sugar, lemon zest, lemon juice, whole eggs, and yolk in the bowl until fully combined.
Thicken
Continue to whisk steadily for about 10 to 12 minutes. The mixture will eventually become opaque and thick enough to coat your spatula.
Emulsify
Remove the bowl from the heat. Whisk in the cold butter, one cube at a time, until the curd is smooth and glossy.
Strain and cool
Pour the curd through a fine-mesh sieve into a clean jar to remove the zest and any stray egg bits. Press a piece of plastic wrap directly onto the surface to prevent a skin from forming.
Other turns to take.
Lime or Grapefruit Curd
Substitute the lemon juice and zest with an equal amount of lime or grapefruit for a sharper or more bitter profile.
Passion Fruit Curd
Replace half the lemon juice with strained passion fruit pulp for a distinct tropical aroma.
When it doesn't go to plan.
Always use a non-reactive bowl like glass or stainless steel; aluminum will react with the acid and leave a metallic taste.
If you accidentally overcook it and see tiny lumps, don't throw it out. Simply pour it through your fine-mesh sieve to catch the solids.
Let the curd chill in the refrigerator for at least four hours before using; it will firm up significantly as it cools.
The ones that keep coming up.
Can I use less sugar?
The sugar is necessary not just for sweetness, but to keep the egg proteins from coagulating too quickly. Reducing it significantly will result in a grainy, thin texture.
How long does it stay fresh?
Stored in an airtight jar, it will hold its quality in the refrigerator for up to two weeks.
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