Actually very easy

Salted crackers

The beliefCrackers are assumed to be factory work, and a home batch is expected to come out like a biscuit.

The truthA cracker is a very dry dough rolled very thin and dried out. The snap comes from the drying, not from the baking.

45 minutes

How to make it

What you need

250 g flour
75 ml water
60 ml olive oil
5 g salt
Flaky salt for the top

How the engine read this list (5 lines)

250 g	Flour	flour
75 g	Water	water
55 g	Olive oil	olive-oil
5 g	Salt	salt
3 g	Flaky salt, for the top	salt

An empty weight means that line could not be turned into grams — either the amount is open ("to taste") or the ingredient has no record here. Neither enters the sum as zero; they do not enter it at all.

Bring the flour, salt, oil and water together and knead for three minutes. The dough should be firm and smooth; it will not soften like bread dough.
Wrap it and rest it fifteen minutes.
Halve it and roll each piece between sheets of baking paper to two millimetres. The thinner it goes, the crisper it gets.
Cut it into squares and prick each square twice with a fork.
Scatter flaky salt over and press it in lightly.
Bake at 180 °C for 12 to 15 minutes, until the edges are gold.
Cool them fully on a rack. A warm cracker is soft: the snap arrives as it cools.

Why it works

Cracker dough runs at about 30% hydration, half as wet as bread. With that little water the gluten network stays weak and the dough does not stretch — which is the point, because stretchy dough springs back as you roll it and never gets thin. Two things happen in the oven: first the remaining water evaporates, then the starch and protein brown above 160 °C. The snap comes from the first. Once a cracker’s moisture falls below about 3% it forms a brittle glassy structure, and that is the sound it makes when you bite it. The holes are functional too: they stop the dough puffing into a balloon and let the steam out, which is why every industrial cracker has them. The fat sets the character of the break — a fatless cracker is hard and sharp, a fatty one crumbles.

The rough sum

388 grams going in

1393 kcal in total

100% of the mass has figures behind it. This is the sum of what GOES IN rather than of what comes out. Wherever something evaporates, drains or ferments the two differ: a kilo of milk is 150 g of cheese.

Diets it qualifies for

Vegan Vegetarian Lactose-free

Storage & shelf life

How long it keeps

A closed tin at room temperature: 3 weeks
A jar with a scrap of bread as a moisture trap: 1 month
In a plastic bag: A week: plastic bags pass moisture
Fridge: Not advised: they go soft

Crackers have exactly one enemy: moisture. While the water activity stays below 0.3 neither mould nor bacteria can live, which is why crackers keep for weeks with no preservative. A soft cracker is not spoiled, only wet from the air: five minutes at 150 °C drives that water back out and the snap returns. A tin beats a glass jar not because of light but because the lid seals better.

When to bin it A bitter or paint-like smell means the fat has oxidised, and that does not come back: throw them out. Merely soft, and the oven will fix them.

History

Where it comes from

The cracker takes its name from the sound it made baking in nineteenth-century America, and its first form was ship’s biscuit — the one bread that survived a long sea voyage. What kept it was not the recipe but the absence of water. It began to be sold as a "cracker" from Josiah Bent’s bakery in Massachusetts in 1801. In Turkey the cracker settled into tea culture after the 1960s and became the first industrial product in the savoury snack aisle.

The knack

If they are not crisp they were rolled too thick: dry them another eight minutes at 150 °C.
Cumin, sesame, rosemary or chilli can go into the dough; the ratios do not change.
Butter instead of olive oil gives a crumblier break, closer to a biscuit.

Dough and grain