How to Make Key Lime Curd That Turns Out Perfect Every Time

Smooth, creamy, key lime curd should be thick enough to hold onto a spoon, but soft enough to melt right back into itself. And if yours has ever turned out runny, lumpy, or suspiciously close to lime-flavored scrambled eggs, you're in the right place. Today, I'm going to show you how to make homemade key lime curd. But more importantly, I'm going to show you what to watch for while you're making it. Because once you understand the signs, this gets a whole lot easier. Key lime curd is one of those little recipes that earns its keep. You can use it between cake layers, inside cupcakes, in tarts and pastries, over cheesecake, or stand in front of the refrigerator eating it from the jar. I'm certainly not here to judge. And because we're making key lime curd, I want that bright citrus flavor to come through without turning it into something painfully sour. The ingredient list is refreshingly short. Sugar, fresh key lime juice and zest, eggs, extra egg yolks, a little salt, and cold unsalted butter. And when you zest your key limes, stop when you reach the white pith underneath. We want that fragrant outer zest, not the bitter white layer trying to hitch a ride. Set the zest aside for now. We'll add it after the curd is cooked. Start with the saucepan off the heat. Add the sugar, fresh key lime juice and salt and whisk them together. Keep that fresh zest set aside. We don't want to cook it. In another bowl, whisk three whole eggs with three additional yolks just until they're combined. Now whisk the eggs into the key lime mixture while everything is still cold. We're giving those eggs a nice peaceful introduction before we introduce them to heat. They appreciate that. Now place the pan over medium to medium low heat and keep whisking. At first, it isn't going to look impressive. It'll be fluid and a little foamy and you'll probably wonder whether anything is happening. It is. As the eggs heat, they're gradually thickening the mixture. What we don't want is boiling. Too much heat can cook those eggs into little pieces instead of turning them into a smooth curd. If you see it bubbling aggressively around the pan, turn the heat down. Key lime curd rewards patience. It does not reward trying to win a race against your stove. Here's the part I really want you to learn because this is where people second guess themselves. Hot curd isn't supposed to look like the thick refrigerated curd you saw at the beginning. Dip in a spoon and run your finger through the coating. If that clean path holds instead of immediately running back together, you're getting there. If you'd rather take the guessing out of it, and I usually vote for less guessing, use an instant read thermometer. Around 165 degrees Fahrenheit gives us a very useful target. As soon as we're there, take the pan off the heat. Now comes the butter. Add the cold butter a few pieces at a time, whisking until each addition disappears before adding more. That butter gives the curd richness and helps create that silky, glossy finish we're after. This is where it starts looking less like an experiment and more like something you're going to have trouble keeping a spoon out of. Next, strain the warm curd through a fine mesh sieve or another fine strainer. We're simply catching any tiny bits of cooked egg, so our finished key lime curd stays beautifully smooth. At this point, the curd should already be thick enough to coat a spoon, but it's still warm and fluid enough to pass through the strainer. Now that the cooking is finished, add that fresh key lime zest we saved earlier. Adding it now keeps that fresh key lime aroma and bright citrus flavor right where we want it, in the finished curd. Your warm curd should already be noticeably thick and coat the back of a spoon, but don't expect its final texture yet. While it's warm, it will still flow easily. Press plastic wrap directly against the surface so a skin doesn't form, let it cool, and then refrigerate it until it's completely chilled. And look at the difference. Once it's completely chilled, it becomes much thicker and creamier. That's the finished texture we're after. So let's make this easy to remember. If your curd is still watery and won't coat the back of a spoon when it reaches temperature, it isn't properly thickened yet. But don't confuse warm, flowing curd with runny curd. If you have obvious little pieces of cooked egg, your heat probably got ahead of you. Get it off the heat and strain it immediately. And this is what we're looking for when it's cold, smooth, thick, and creamy, but still soft enough to spread. Once you know how to make key lime curd, you've got one recipe that can turn into a dozen different desserts, cake filling, cupcakes, tarts, pastries, cheesecake toppings, and yes, straight from the jar still counts. So now you know what your key lime curd should look like while it's warm, what temperature you're aiming for, and what changes once it chills. If this helped you master key lime curd, give the video a like and subscribe to Key Lime Delights because we have a lot more key lime goodness coming your way. And don't go anywhere. There's another key lime video waiting for you right here. Thanks for spending some time with me, and we'll see you in the next video.