Meat & dairy

Eggs: grades and freshness.

Egg grading is mostly about size and shell condition, not about what is inside: small, medium and large describe weight per egg, and brown or white describes the breed of hen and nothing else. To test freshness, lower an egg into a glass of water. A fresh one sinks and lies flat on its side; an older one tilts upright; one that floats has been around a long while.

What the words on an egg tray actually mean

Size is the part of egg labelling that is genuinely standardised. Small, medium and large refer to bands of weight per egg, which matters when you are baking to a recipe and matters very little when you are frying two for breakfast. If a recipe was written around large eggs and you have small ones, add an extra egg for every three or four the recipe asks for.

Shell colour is decided by the breed of hen. Brown eggs come from brown-feathered breeds, white eggs from white ones, and once they are cracked into a pan there is no difference attributable to the shell. Desi eggs are a real distinction, but a different one: they come from smaller village hens, are noticeably smaller, often have a thicker shell, and tend towards a deeper orange yolk because a foraging hen eats a more varied diet than a caged one. Yolk colour follows the feed, so a deep yolk tells you about the hen's diet, not about the egg's freshness.

Housing terms — free-range, barn, cage-free — describe how the hen was kept. They are not grades, and they say nothing about how recently the egg was laid.

The float test, and two tests that tell you more

The float test works because an eggshell is porous. From the day it is laid, moisture and gas pass slowly out through thousands of tiny pores, and the air cell at the blunt end grows to fill the space. A fresh egg has almost no air cell and sinks flat. As the cell grows, the blunt end lifts and the egg stands up in the glass. A floater has an air cell large enough to carry it, which means it is very old, and that one is not worth cracking.

The plate test tells you more, at the cost of committing to the egg. Crack it onto a flat plate rather than into a bowl. A fresh egg sits high and compact: the yolk domes up, and the white has two clear zones — a thick, cloudy layer hugging the yolk and a thinner one around the rim. As an egg ages the thick white breaks down, so it spreads wide and watery and the yolk flattens and bursts easily when nudged.

The shake test is the quick one when you are standing at the fridge. Hold the egg to your ear and shake it gently. A fresh egg is silent, because the contents fill the shell. A sloshing sound means a large air cell and a loosened white. And if a cracked egg smells at all sulphurous, no other test is required.

Sinks and lies flat: very fresh.
Tilts blunt end upward but stays down: older, and better used for boiling than poaching.
Floats clear of the bottom: bin it without cracking it.
Sloshes when shaken, or spreads thin and watery on the plate: past its best.

Storing eggs in a Lahore kitchen

Keep them in the fridge and keep them in their carton. The carton matters for two reasons: an eggshell is porous enough to pick up strong smells from an open fridge, and the cardboard buffers the temperature swings that happen every time the door opens. The moulded egg rack in the door is the one place to avoid, for the same reason it is wrong for milk — it is the warmest, most disturbed spot in the appliance.

Store them pointed end down. That keeps the air cell at the top and the yolk centred in the white, which is exactly what you want if the egg is going into a poach or a half-fry later. Do not wash eggs when you bring them home either: the shell carries a natural coating that seals those pores, and washing strips it and lets the egg age faster. Wash it just before you crack it if it needs it.

One habit worth keeping in a hot kitchen: take out only the eggs you need and leave the rest cold. A cold egg carried into a humid Lahore afternoon sweats, and moisture sitting on a porous shell is exactly what the shell is built to keep out.

When a slightly older egg is the better egg

Freshness is not always the goal, which surprises people. Very fresh eggs are miserable to peel after boiling, because the membrane clings tightly to the shell and takes chunks of white with it. Eggs that are a week or two old peel cleanly, so if you are making anday ka salan or a batch for a picnic, use the older tray and keep the new one for frying.

Poaching wants the opposite. A fresh white is thick enough to gather itself around the yolk in simmering water, while an old, watery white shreds into threads across the pan. Whisking whites for a meringue or a cake is easier with slightly older eggs at room temperature, because the looser white whips to a greater volume. A plain half-fry holds its shape better with a fresh egg too.

Cracked shells, blood spots and green yolks

Leave cracked eggs on the shelf, even hairline ones. The shell and its membrane are the whole defence against what is in the air and on the tray, and once that is broken the egg is on a much shorter clock. Check the tray before you buy by lifting each egg rather than looking at it — an egg stuck to the carton is usually stuck because it has leaked.

A small red speck on the yolk is a blood spot, a tiny vessel that ruptured while the egg was forming. It is not a sign of fertilisation and it does not mean the egg is old; lift it out with the tip of a spoon if it bothers you. The grey-green ring that sometimes forms around a hard-boiled yolk is not a fault in the egg either — it is iron and sulphur reacting under prolonged heat, and it means you boiled it too long or cooled it too slowly. Shorter boiling and a plunge into cold water afterwards keeps the yolk yellow.

Common questions

Does the float test really work for eggs?: Yes, and the reason is physical. An eggshell is porous, so moisture escapes slowly over time and the air cell at the blunt end grows. A fresh egg has almost no air cell and lies flat on the bottom, an older egg tilts upright, and one that floats has an air cell large enough to lift it.
Are brown eggs different from white eggs?: Only in the shell. Colour is determined by the breed of hen, so brown-feathered breeds lay brown eggs and white ones lay white. Once cracked, there is no difference attributable to shell colour. Yolk colour is a separate matter and follows what the hen has been eating rather than the shell she produces.
Should eggs be kept in the fridge or on the counter?: In the fridge in a Lahore kitchen, and inside their carton rather than in the moulded rack in the door. The carton buffers temperature swings and stops the porous shell absorbing fridge smells. Store them pointed end down so the air cell stays at the top and the yolk sits centred.
Why are fresh eggs so hard to peel after boiling?: In a very fresh egg the inner membrane clings tightly to the shell, so peeling tears away pieces of the white. Eggs that are a week or two old separate from the membrane and peel cleanly. Keep the newest tray for frying and poaching, and boil the older one.