This recipe turns the bright, sunny flavor of limes into a smooth, spreadable curd that is perfect for scones, toast, or as a filling for cakes and tarts. It is a simple and reliable method that uses basic ingredients and techniques, resulting in a tangy-sweet treat that is far superior to store-bought versions. This lime curd is a wonderful project for a school bake sale or a fun weekend kitchen activity with kids.
Ingredients
- 4 large limes (about 1/2 cup / 120 ml juice and 2 tbsp zest)
- 1/2 cup (100 g) granulated sugar
- 4 large egg yolks
- 1 large whole egg
- 1/2 cup (115 g) unsalted butter, cut into small pieces
- Pinch of salt
Instructions
- Wash the limes thoroughly. Zest two of the limes to get about 2 tablespoons of zest. Then juice all four limes to get about 1/2 cup (120 ml) of juice. Set aside.
- In a medium heatproof bowl, whisk together the sugar, egg yolks, whole egg, lime zest, lime juice, and salt until well combined.
- Place the bowl over a saucepan of simmering water, making sure the bottom of the bowl does not touch the water. This creates a gentle double boiler.
- Cook, stirring constantly with a whisk or a silicone spatula, for about 10-15 minutes. The mixture will gradually thicken. You know it is ready when it coats the back of a spoon and leaves a clear trail when you run your finger through it. The temperature should reach 160°F (71°C) as the safe minimum for egg dishes, which you can check with a food thermometer.
- Remove the bowl from the heat. Add the butter pieces one at a time, whisking until each piece is fully melted and incorporated before adding the next. The curd will become glossy and smooth.
- Pour the curd through a fine-mesh strainer into a clean bowl to remove any bits of cooked egg or zest for an extra-smooth texture (this step is optional but recommended).
- Let the curd cool to room temperature, stirring occasionally to prevent a skin from forming. This takes about 30-45 minutes.
- Transfer the cooled curd to a jar or container with a tight-fitting lid. Refrigerate for at least 2 hours to set completely before serving.
Tips
- Use fresh limes for the best flavor. Bottled lime juice will not give the same bright, fresh taste.
- Stir constantly while the curd cooks to prevent it from curdling or scrambling. The low heat of the double boiler is key.
- If you prefer a thicker curd, cook it for a few minutes longer. If it gets too thick, you can whisk in a teaspoon of warm water to loosen it.
- For a smoother texture, strain the curd after cooking. This removes the zest and any accidental bits of egg.
Serving Suggestions
Serve this lime curd spread on freshly baked scones, toast, or English muffins. It also makes a delightful filling for mini tart shells or a layer in a Victoria sponge cake. For a simple dessert, swirl a spoonful into Greek yogurt or serve it alongside a scoop of vanilla ice cream.
Variations
This recipe is easily adapted. For a lemon curd, simply replace the limes with the same amount of lemons. For a key lime version, use key limes, which are smaller and more tart, and reduce the sugar to 1/3 cup (65 g). You can also add a teaspoon of grated fresh ginger to the mixture for a spicy twist.
Storage and Reheating
Store the lime curd in an airtight container in the refrigerator for up to 1 week. It will thicken further as it chills. To serve, spoon out the desired amount and let it sit at room temperature for 10-15 minutes to soften. Do not microwave the whole jar, as this can cause the curd to separate. You can freeze lime curd for up to 3 months in a freezer-safe container; thaw it overnight in the refrigerator before using.
Frequently Asked Questions
Can I use bottled lime juice? Yes, but the flavor will be less vibrant and may have a slightly bitter aftertaste. For the best results, use fresh-squeezed juice.
Why did my curd curdle? Curdling usually happens if the heat is too high or if you stop stirring. The double boiler should be at a gentle simmer, and you must stir constantly. If it does curdle, strain the curd immediately to remove the lumps.
Can I use fewer egg yolks? You can use 3 egg yolks and 1 whole egg, but the curd will be slightly less rich and may be a bit thinner. The listed proportions give the best texture.
How do I know when the curd is done? The curd is done when it coats the back of a spoon and leaves a clear line when you run your finger through it. It will also thicken more as it cools.
Can I make this without a double boiler? Yes, you can use a heavy-bottomed saucepan directly over low heat, but you must be very careful and stir constantly to avoid scorching. The double boiler method is safer and more forgiving.
Is it safe for kids to eat? Yes, as long as the curd is cooked to 160°F (71°C), which is the safe minimum for egg dishes, and is stored properly in the refrigerator. This recipe is a fun and safe cooking project for children under adult supervision.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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