Question 1

Why do recipes fail when you double them?

Accepted Answer

Because a recipe is a set of **physical processes**, not a list of proportions, and several of those processes **do not scale linearly with quantity**. Doubling the ingredients doubles the mass but does not double the pan, the surface area, or the rate at which heat moves.

**The things that break:**

**Surface area to volume ratio falls.** Double the volume in the same shaped vessel and the surface area grows by much less. Since evaporation, browning and heat transfer all happen at surfaces, **everything that depends on a surface slows down relative to the bulk**.

**Evaporation reduction.** A sauce reduced in half the time at single quantity takes far longer than twice as long doubled — which is why doubled stews come out watery if cooked to the original time.

**Browning fails.** Doubling meat in the same pan drops the pan temperature, releases more moisture than can evaporate, and the food **steams instead of searing**. The fix is batches, not a bigger burner.

**Heat penetration is not linear.** A cake twice as deep takes considerably more than twice as long for the centre to reach temperature, and the outside overcooks while waiting. **Doubling a cake means two tins, not one deeper one** — the single most common doubling failure.

**Come-up and cool-down times lengthen**, changing how long food spends at every intermediate temperature.

**The ingredients that do not scale proportionally:**

**Salt and seasoning** usually do scale, but should be adjusted at the end rather than doubled blindly.

**Raising agents.** Doubling baking powder in a larger, deeper item frequently produces over-rise then collapse.

**Strong aromatics** — garlic, chilli, spices, and particularly anything bitter — often need less than double.

**Alcohol and acid** concentrate differently depending on evaporation.

**Thickeners** behave non-linearly and are best added to effect.

**Yeast** need not be doubled; time can do the work.

**What to do instead:** keep vessel **depth** similar and increase area, cook in batches where browning matters, judge by **state** rather than time, and scale seasoning last.

Question 2

Why does frying in batches actually matter?

Accepted Answer

Because adding too much food at once drops the pan temperature, and below a certain point the food steams instead of browning — producing grey, soggy results from the same ingredients and the same

Question 3

Why does cutting food the same size matter?

Accepted Answer

Because cooking is a rate, and pieces of different sizes cook at different rates — so uneven cutting guarantees that something is overdone by the time the largest piece is ready. The physics. Heat

Question 4

Why does bread dough need to prove twice?

Accepted Answer

Because the two rises do different jobs. The first develops flavour and structure; the second creates the final texture of the loaf. The first prove, sometimes called bulk fermentation, is the long

Question 5

What is carryover cooking?

Accepted Answer

Food continues to cook after it leaves the heat, because the hot exterior keeps transferring heat inward until the temperature evens out. Ignoring it is the most common cause of overcooked meat among

Question 6

What is the difference between a stew, a braise and a casserole?

Accepted Answer

How much liquid is used, how the food is cut, and — for one of them — whether the word refers to the dish or the pot. Braise. Food is partially submerged in liquid, typically coming a third to

Question 7

What is the Maillard reaction?

Accepted Answer

The Maillard reaction is what happens when amino acids and reducing sugars meet heat, producing hundreds of new aroma and flavour compounds along with brown colour. It is responsible for the taste of

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