Desserts made properly at home

Why baking is weighed, and what 10 g does

A cup measures volume, and the volume of flour changes with how you handle it: the same cup holds anywhere from about 120 g to 155 g depending on whether you spooned it in or dug it through the bag. A scale deletes that variable, which is why pastry recipes are written in grams.

Ten grams sounds trivial until you set it against the batch. In a dough built on 250 g of flour it is four per cent more starch soaking up the same butter and egg: stiffer dough, less spread, a cakey cookie rather than a chewy one. Ten grams short and the tray bakes into one continuous cookie.

Weigh into the bowl on the tare button. Two shortcuts are safe: 1 ml of water or milk counts as 1 g, and a large egg out of its shell is about 50 g, roughly 30 g white and 20 g yolk.

Sugar does four jobs, only one of them sweetness

Halving the sugar in a baking recipe does not simply make it less sweet, it makes it a different cake: sugar builds the crumb, drives the browning and holds the moisture.

Creamed into butter, sugar crystals cut the air pockets a leavener later inflates. In a custard it raises the temperature at which egg protein sets, widening your margin before curdling. It caramelises and feeds the Maillard reaction, so a low-sugar cake bakes pale and reads flat. And it is hygroscopic, holding water in the crumb, which is why reduced-sugar cakes dry out within a day.

Type matters as much as quantity. Brown sugar carries molasses, which is wet and acidic: softer, chewier, darker, and it gives any baking soda something to react with.

Creamed butter, melted butter, cold eggs

The choice that most changes a cake is whether the butter goes in soft and beaten or melted and stirred. Creaming means beating butter at 18 to 20 °C (65, 68 °F) with sugar for three to five minutes until it is pale and visibly bulkier: you are aerating, not mixing, and the payoff is a taller, more open crumb, right for a sponge or madeleines. Melted butter gives density and chew instead, which is what a brownie wants, and it coats the flour faster, restricting gluten and keeping the middle fudgy.

Recipes specify room-temperature eggs and milk for a reason. A fridge-cold egg dropped into creamed butter chills the fat back towards solid and the emulsion splits, which you see as a curdled batter and taste later as a dense, greasy cake. Sit whole eggs in tepid water for five minutes.

Butter that is too warm cannot be creamed. If it looks glossy or leaves a slick on your finger it has begun to melt and will not hold air.

Gluten, and the moment you stop mixing

Flour plus water plus agitation makes gluten, an elastic protein network that is everything you want in bread and almost never what you want in a dessert. Mix a cake or pastry batter past the point where the flour disappears and it turns tough; nothing later in the process undoes it.

Treat wet and dry as two systems, combine them last, and stop the instant no dry flour shows. Lumps are harmless. Shortcrust keeps cold fat in visible pieces so it physically blocks the strands from linking, which is what shortness means.

Then rest it. Half an hour in the fridge hydrates the flour and relaxes the gluten you did build, which is the difference between a tart shell that holds its walls and one that slumps down the tin. Resting cookie dough overnight works differently, and the reward is deeper browning.

Baking soda needs an acid

Baking soda is a base and gives off carbon dioxide only when it meets an acid, so a recipe using it must also contain buttermilk, yoghurt, brown sugar, honey, natural cocoa, lemon juice or vinegar. Without one you get little rise and a soapy aftertaste. Baking powder is soda pre-mixed with a dry acid and a starch buffer, so it works in anything.

Both start reacting the moment they meet liquid, so get the batter into the oven rather than letting it stand. Test an old tin in hot water: no fizz, no use.

Oven reality: calibrate, rotate, watch the end

Domestic ovens routinely sit 10 to 20 °C (20, 35 °F) away from the dial and cycle around that rather than holding a line, so the number you set is an average, not a temperature. A cheap oven thermometer is the best value in the kitchen.

Find the hot corner and rotate the tray once, around the two-thirds mark. Keep the door shut for the first half of a cake, or a sponge that has not set will fall. In a fan oven, drop the stated conventional temperature by about 20 °C (35 °F).

The last five minutes decide everything, because colour develops on an accelerating curve. Use a doneness signal rather than the clock: cookies come out while the centres still look underdone and firm up on the tray; a sponge is done when a skewer carries a few moist crumbs; a tart shell when the base is dry and sandy, not merely golden at the rim.

Custards, cream and chocolate

The window where egg thickens, then scrambles

An egg custard thickens at roughly 80 to 84 °C (176, 183 °F) and curdles barely above it, so 82 °C (180 °F) is the target and a probe thermometer is not fussiness. Temper first: pour the hot cream into the yolks in a thin stream while whisking, so they warm gradually instead of setting on contact. Cook low, stir into the corners of the pan, and strain the result. A crème brûlée is the same chemistry with the oven stirring for you, which is why the water bath matters.

Cream, whipped to the right stage

Cream whips because cold fat globules partially crystallise into a scaffold around air bubbles, so use 35 per cent fat or more, fridge-cold, in a cold bowl. Soft peaks flop over as the whisk lifts and are what you fold into a mousse; stiff peaks hold their point and are for piping. Past that it collapses into butter.

Tempering chocolate, in plain terms

Cocoa butter sets into several crystal forms and only one is glossy, snaps cleanly and resists blooming grey; tempering steers it there. Melt two-thirds of the chopped chocolate to about 45 °C (113 °F), take it off the heat, stir in the rest, and keep stirring until it cools to 31, 32 °C (88, 90 °F) for dark. The unmelted pieces carry the right crystals and recruit the others. One drop of water seizes it into paste.

Post the bake, not only the perfect one

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Nine desserts worth learning properly

Each drills one mechanism above, which is why repeating them beats collecting more.

Chocolate chip cookies, butter temperature and spread. Rest half the dough overnight and compare.
Tiramisù, folding mascarpone without knocking the air out; more in our Italian cooking guide.
Lemon tart, blind-baked shortcrust and a curd that lives in the egg window.
Crème brûlée, the water bath, and pulling it while the centre wobbles.
Brownies, melted butter, minimal mixing, an underbaked middle on purpose.
Panna cotta, gelatine set just firm enough to stand.
Apple tart, chilled rested pastry, fruit sliced thin enough to cook while the crust does.
Chocolate mousse, soft peaks and folding; the aquafaba version in our vegan cooking guide works the same way.
Madeleines, creamed butter, rested batter, cold tin, hot oven.

Frequently asked questions

Do I really need kitchen scales to bake?

Yes, if you want the same result twice. A cup of flour can weigh anywhere from about 120 g to 155 g depending on how it was filled, and a 10 per cent swing in flour is the difference between a chewy cookie and a cakey one. Scales that read to 1 g are inexpensive, and weighing straight into the bowl leaves fewer cups to wash.

Why did my cookies spread into one flat sheet?

Almost always butter that was too warm, or dough that went onto a hot tray. Fat that has begun to melt cannot hold the air you creamed into it, so the dough slumps before the structure sets. Chill the shaped dough for at least 30 minutes, start each batch on a cool tray, and check that you have not under-measured the flour.

My custard scrambled. Can I save it?

Sometimes. Take it off the heat at once, pour it into a cold bowl to stop the cooking, then blend it hard with a stick blender and pass it through a fine sieve. That rescues a custard that has only just broken. If it smells of cooked egg and carries visible curds throughout, it has gone too far, and the next one needs a lower heat and a thermometer held around 82 °C (180 °F).

Can I use baking powder instead of baking soda?

Not one for one. Baking powder is roughly three times weaker because it is already diluted with acid and starch, so you would need about three times as much, and that much tastes bitter. The reverse swap is worse: baking soda with no acid in the recipe gives almost no rise and a soapy flavour. Buy both and keep them under a year old.

Why does my sponge sink in the middle?

The three usual causes are opening the oven door before the crumb has set, too much leavener inflating a structure that then collapses, and taking the cake out while the centre is still batter. Leave the door shut for the first two-thirds of the bake, measure the raising agent rather than eyeballing it, and test with a skewer that comes out carrying a few moist crumbs.

Do I have to temper chocolate for everything?

No. Tempering matters only when the chocolate sets as a visible layer you want glossy and snappy, such as a coating, a decoration or a bar. Chocolate going into a mousse, a ganache, a batter or a brownie is being combined with cream, butter or eggs and does not need it. Melt it gently, keep every drop of water away from it, and stir.