1,612 easy and fully explained recipes, with +66K photos and 77 videos

This site uses only a few technical cookies that are necessary for its operation.
By continuing to browse, you agree to their use (learn more...).

Egg yolks and caster sugar

We often come across recipes where we need to mix egg yolks with caster sugar.

This would appear to be a very ordinary and simple thing to do but, be warned, these two ingredients can behave oddly together.

87 K 2× 4.3/5 (29 reviews)

Last modified on: February 15^th 2018

For this post Comments Lasts posts Follow

For this post: Comment Follow Ask me a question Send to a friend

Let’s take confectioner's custard (crème pâtissière, or french pastry cream) as an example: there’s a stage at which the egg yolks are mixed with the sugar. Is there anything particularly difficult about this? Not really. We mix the yolks and sugar together (without whisking) and that’s all, but there’s an important little tip well worth knowing. You might be tempted to separate the egg yolks from the whites and simply tip them into the weighed-out sugar, as shown in the photo below. Then why not go off to do something else, such as putting the milk on to heat up, before coming back to the egg yolks and sugar mixture later?

egg yolks and caster sugar

Why not? Because you will regret it if you do! Something starts to happen as soon as the egg yolks come into contact with the sugar. The sugar sucks out the water from the egg yolks (we say that sugar is hygroscopic) and this effectively begins to “cook” the surface of the yolks. The result is patches of hard yolk (like in a hard-boiled egg) which will not mix in when you add the boiling milk. These will remain as small lumps in your custard and spoil its normal smooth, creamy texture.

This might not seem like a big deal, but it happens very rapidly. If the egg yolks and sugar are in contact for longer than a minute, the reaction will begin and little hard lumps will start to develop.

How can we avoid this? It’s really quite simple, and this goes for any recipe involving a mixture of egg yolks and sugar: put the egg yolks into bowl, then add the sugar required and mix immediately with a spoon or, better still, with a soft spatula. Once mixed like this, the mixture can be left until later without any problem.

egg yolks and caster suger mixed

As a precaution, you can do what professional pastry chefs do: 1) make sure you use this method of mixing immediately, 2) strain your mixture of egg yolks+sugar+milk+vanilla+cornflour through a fine sieve when you pour it back into the saucepan. This way, you can be sure that your custard will be perfectly smooth. You might well be surprised by what you see left in the sieve: lumps, milk skin, bits of cooked egg yolk, shreds of vanilla pod…

straining cream

It is worth mentioning that professional pastry chefs will often strain their cold custard a second time through a very fine sieve before using, to make absolutely sure that the texture is smooth. But maybe that’s going a bit far for us amateurs…

To sum up: A recipe where egg yolks are mixed with sugar? Mix these two together immediately with a soft spatula, then you can safely leave them while you get on with the rest of the recipe.

Lasts posts

Season to the right level

When you need to salt something—for example, fish fillets before cooking them—you’ll naturally sprinkle them with a pinch of salt using your fingers. There’s nothing particularly remarkable about this very ordinary gesture, which is done all the time in the kitchen, and yet there’s a...
October 14^th 20261,5555

How to Properly Fill a Jar

When you have a jar in your kitchen that’s almost empty—flour or almond flour, for example—you’ll probably refill it before it’s completely empty. And that’s a great way to go about it—no one wants to run out of an ingredient right in the middle of a recipe. Once you’ve...
October 2^nd 20261,1095

Serving Temperature for Wine

When it comes to serving wine, you may (like me) have a fairly simple rule of thumb: red wine at room temperature, and white, rosé, and yellow wines in the fridge until it’s time to serve them. It’s very easy to remember, but it’s a bit simplistic, and you’ll see that there’s a much...
September 23^th 20261,1905

Hot Emulsified Sauces

In French cuisine, sauces are a very important part of a recipe—not just a side dish. In fact, they’re so important that, especially since the time of Auguste Escoffier, they’ve been classified into categories. And among these categories are “hot emulsified sauces,” or lukewarm ones. ...
September 9^th 20261,6095

Hot Dishes and Cold Dishes

When plating or serving a dish—whether hot or cold—on a plate, it’s very important to make sure they’re both the right temperature; in other words: if the dish is hot, the plate should be hot, and conversely, if the dish is cold, the plate should be cold. Is this really important? Let’s...
September 2^nd 20261,3603

See all posts Random post RSS feeds

Other articles you might also like

The so-called "nervous" meats

You've probably heard this before, we're talking about "nervous" meat, or meat with nerves, to describe what is indicated by the blue arrow on the left. This is a piece of beef, and what we call a nerve is not a nerve, it is in fact collagen (chemists sometimes call it a "collagen sink"), a...
April 16^th 202143 K4.4

The right size of zucchini

When you buy zucchini at the market, you're often offered a wide variety of sizes, from very small to very large. But which ones to choose? Here are a few tips.
September 9^th 202413 K5

The color of the bread crumb

When you go to buy bread, at your baker's, at the time of the choice, if you hesitate of course, you will undoubtedly be very sensitive to the color of the crust, and you will be right. The color of the crust, from golden, to sometimes very dark, deep brown almost black, depending on the maturity...
April 30^th 202224 K4.6

Parsley stems

Parsley, whether curly or flat, is a delicious ingredient in many recipes, where it is used both raw and cooked. When used raw, in a salad for example, where it always provides, alone or with other herbs, a remarkable freshness, only the leaves are kept. And when used cooked?
July 28^th 202512 K 13

The golden-brown finish on puff pastry

Let's take a look at the tricky matter of producing puff pastry with an attractive, golden-brown finish. French pastry chefs call this "dorure" (literally, "gilding"). Behind this quirky term there lurks a real problem (and the solution): when using puff pastry (pâte feuilletée) for a pie, or...
February 8^th 201852 K 24.6

The 2 comments already posted on this page

What is the best name should be given to a small household business that concentrate in making sweet cake, Bread and bun, pizza and pineapple pie?
Posted by Anonymous january 12^th 2020 at 19:25 n° 2
What about "Home sweet bakery"?
Posted by jh Auteur january 14^th 2020 at 15:43 n° 1

Follow this page

Receive an e-mail as soon as this page is modified or receives a new comment.

We'll never share your e-mail address with anyone else.

Alternatively: you can subscribe to the mailing list of cooling-ez.com , you will receive a e-mail for each new recipe published on the site.