Why Did My Bitter Orange Tart Filling Not Set? | Ask Nigella.com (2024)

Full question

I made the Bitter Orange Tart but the filling didn't turn solid after 15 hours in the fridge. I'm not sure whether adding some cornstarch into the curd would've helped?

Our answer

Nigella's Bitter Orange Tart (from SIMPLY NIGELLA) has a gingernut (gingersnap) crumb base that is filled with a curd made from the juice of bitter Seville oranges. You can also use a combination of sweet orange and line juice as an alternative to the Seville orange juice.

The curd should be softly set but not completely solid, so it may just be that you expected a more solid filling such as for a lemon meringue pie. If the filling is runny and flowing out of the tart when you cut into it, then it is likely that the curd was not cooked for quite long enough. You need to be patient when cooking citrus curds as if you heat the mixture too quickly then it can curdle and become lumpy. You need to keep a low heat and stir constatntly. The time it takes for the curd to thicken can vary accoding to the size of the pan and the heat used. To test if the curd is cooked properly, dip a spoon into the mixture then run your finger through the mixture on the back of the spoon. The line made by your finger should hold and remain clear, without any sign of the curd flowing back into the space. If the curd looks like it is flowing back then return the pan to the heat, cook for a couple of minutes longer and test again. If you have a sugar, candy or digital thermometer then the curd should thicken between 77c and 82c (170-180F), but we would still recommend checking the thickness of the curd as described. The curd should thicken more as it cools.

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Why Did My Bitter Orange Tart Filling Not Set? | Ask Nigella.com (2024)

FAQs

Why Did My Bitter Orange Tart Filling Not Set? | Ask Nigella.com? ›

If the filling is runny and flowing out of the tart when you cut into it, then it is likely that the curd was not cooked for quite long enough. You need to be patient when cooking citrus curds as if you heat the mixture too quickly then it can curdle and become lumpy. You need to keep a low heat and stir constatntly.

Why is my orange curd not setting? ›

Why is my curd not thickening? Orange curd is usually too thin if it hasn't been heated for long enough. First check whether your orange curd really is too thin by allowing it to cool completely, as it will thicken as it cools.

Why didn't my lemon tart set? ›

A custard with both eggs and starch needs to be thoroughly cooked. The reason is that yolks contain an enzyme which liquidifies starch. It doesn't happen outright, but will happen while your tart is cooling. The only way to prevent it is to heat the mix high enough so the enzyme is deactivated.

What to do with bitter oranges? ›

Its zest is extremely aromatic and can be used in a variety of sweet and savory dishes, as well as for making bitters. Even the peel of a bitter orange can be simmered in a sugar syrup to make candied peel.

Why is my tart filling not setting? ›

If the filling is runny and flowing out of the tart when you cut into it, then it is likely that the curd was not cooked for quite long enough. You need to be patient when cooking citrus curds as if you heat the mixture too quickly then it can curdle and become lumpy. You need to keep a low heat and stir constatntly.

What to do when curd does not set? ›

You may have held the yogurt at too high a temperature, and killed your bacteria. You might have forgotten to make sure the starter you used had live bacteria. Either of those problems can be fixed by adding the right bacteria and watching the temperature more closely.

How to fix bitter orange marmalade? ›

The main secret in producing a sweet (instead of bitter) marmalade is to reduce the amount of white pith, seeds, and membranes.

How do you counteract bitter oranges? ›

(and other citrus fruit) if you have to cook them in a. recipe, boil them submerged (which is why I have the. bowl and cast iron dish on top) in water and 1 tsp salt.

What is the difference between sweet oranges and bitter oranges? ›

In contrast, bitter orange (Citrus aurantium L.), is termed sour or Seville orange, although resembling sweet orange morphologically, it can be distinguished by its acidic pulp, more bitter albedo and the very characteristic pleasant odor of its fruit and leaf essential oil (Moufida & Marzouk, 2003).

How to fix runny orange curd? ›

You can use cornstarch to help thicken the curd and you would mix the cornstarch (½ Tablespoon should be fine) with the orange juice and make a slurry to add to the sugar substitute and egg yolks in the sauce pan. As you heat the mixture, the cornstarch will activate and thicken the curd.

Why does curd not set? ›

Usually the temperature of milk determines how well your curd will set. Too cold or too hot temperature can make the curd setting process tougher. Firstly boil your milk properly and switch off the flame. Once the boiled milk cools down to 20 per cent, then the milk is ready to be set.

Why is my curd not thickening? ›

Trouble shooting: Most Lemon Curds are runny because they don't get cooked long enough, to 170 degrees F, to thicken the egg yolks – so cook on! If your curd isn't thickened after 10 minutes, or up to 15 if using a double boiler, then increase the temperature of the stove slightly – and don't stop whisking!

Why are my curds not forming? ›

CURDS THAT WON'T COME TOGETHER

This is often caused by improper temperatures; either you used UHT (Ultra High Temperature) pasteurized milk or your curds got too hot when you were preparing for the stretching stage, or they didn't get hot enough. The temperature of the curds before stretching should be 160° to 170°F.

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