We Baked Eight Challahs to Settle One Argument

Every challah recipe tells you to brush it with egg. Almost none of them tell you which egg, or what happens if you use the white instead of the yolk, or why the seeds slide off yours and not off the one in the bakery window.

So we baked eight. Same dough, same oven, same day. The only thing that changed was what went on top.

The one that wins

One whole egg, well beaten, plus one teaspoon of sugar.

Deep gold, maximum shine, and it holds. If you only ever learn one wash, learn that one.

The sugar is not decoration. It is what takes the colour from pale-gold to the deep gold you were picturing when you started.

The one to use when you are in a hurry

One whole egg plus one teaspoon of water.

Slightly lighter, slightly less shine, and by a distance the easiest to brush. The water thins it just enough that it stops pooling in the crevices between the strands.

That matters more than it sounds. A pool of egg does not bake, it burns, and one dark patch on an otherwise perfect loaf is the difference between the challah you meant to make and the one you apologise for.

The bakery crust

One yolk plus one teaspoon of water.

Deep mahogany, high shine, and unmistakably the colour you see in a bakery window. The white is what makes a wash pale, so taking it out is what makes this dark.

Add a teaspoon of honey and it goes darker still, amber and slightly sticky, which is the one to reach for at Rosh Hashana and through Sukkos.

The one nobody expects

One egg white plus one teaspoon of vanilla sugar.

Pale. Matte. Faintly crackled. It looks, at first, like the loaf you got wrong.

And it holds seeds better than anything else in the test. Not slightly better. Better in a way you notice when you pick the loaf up and nothing falls on the counter.

If the toppings are the point, this is the wash. The pale crust stops competing with them.

No egg in the house

Two tablespoons of maple syrup thinned with two teaspoons of water.

Golden, decent shine, and genuinely good rather than a compromise. Silan works the same way. If you are baking for someone who does not eat egg, this is the answer and you do not need to explain it away.

For a savoury loaf

One tablespoon of olive oil, brushed on.

Light beige, low shine, and the right base for zaatar, coarse salt and rosemary, or plain sesame. A sweet shiny crust fights savoury toppings. This one does not.

The one to stop and ask about

Milk or cream in the wash makes the whole loaf dairy.

That is not a small thing. It cannot go on a fleishig table afterwards, and the loaf looks exactly the same as a parve one. If anyone other than you might brush it, the answer is to ask first, every time.

What we actually learned

The washes are not better and worse. They are for different jobs.

Sugar for colour. Water for ease of brushing. Yolk for depth. White for grip. Maple when there is no egg. Oil when it is savoury.

And the loaf you have been making for years is probably one teaspoon away from the one you were picturing.

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