Reading & Adapting Recipes

Basic Cookery

Chapter 9 · Reading, Adapting & Scaling Recipes

Every recipe you use after this course assumes you can actually read it properly, adjust it sensibly, and scale it without breaking it. This chapter is about that meta-skill — the difference between following a recipe and genuinely understanding one.

How a Recipe Is Actually Structured

Most recipes share the same basic shape: a yield (how many servings), an ingredient list — usually in the order they're used, sometimes grouped by component ("For the sauce:", "For the salad:") — and a method.

Common shorthand: tbsp/tsp (tablespoon/teaspoon), "to taste" (add gradually and check against Chapter 5's own tasting discipline), "as needed" (amount genuinely depends on the situation), "room temperature" (matters more than it sounds for some ingredients, especially in baking).
Prep verbs matter: "fold in" means a gentle, minimal-mixing motion (Chapter 6's own warning about overmixing batter); "whisk" implies real incorporation and air; "sauté" and "sear" imply Chapter 4's own dry-heat, high-temperature methods specifically.

Read the whole recipe before you start This is Chapter 1's own advice, worth repeating here directly: the most common real mistake isn't a technique failure, it's discovering halfway through that a later step needed something prepped ten minutes ago. A full read-through first is the cheapest investment you can make in a smooth cooking session.

Substituting Ingredients Sensibly

The useful question isn't "can I swap this ingredient?" — it's "what job is this ingredient actually doing?" Once you know that, Chapter 5's own salt/fat/acid/heat framework tells you what else could do the same job.

Original	Reasonable substitute	Why it works
Buttermilk	Milk + a splash of lemon juice or vinegar, rested 5 minutes	Recreates the acidity buttermilk brings to the dish
Shallot	A small amount of onion, or spring onion	Same allium family, doing the same aromatic job
One fresh herb	Another fresh herb with a similar character	Both are doing a fresh, aromatic finishing job (Chapter 5)
Wine, in a pan sauce	Stock, with a small splash of vinegar for acidity	Recreates both the liquid and the acid the wine was providing
Fresh chilli	Dried chilli flakes or hot sauce, to taste	Same "spicy heat" job from Chapter 7's own note on chilli

Where substitution is risky

Baking specifically — precise ratios of flour, fat, sugar, and leavening drive real chemical reactions. This course doesn't cover baking in depth, but it's worth knowing substitutions there are far less forgiving than in savoury cooking.

Where substitution is forgiving

Most savoury cooking — soups, stir-fries, salads, sauces. As long as the substitute is doing the same job (acid for acid, aromatic for aromatic), the dish usually still works, even if it tastes a little different.

Scaling a Recipe Up or Down

Multiplying ingredient quantities is the easy part. Two things genuinely don't scale linearly, and catch people out:

Seasoning. Salt, chilli, and strong spices rarely need to double just because everything else did — taste and adjust incrementally (Chapter 5's own discipline), rather than blindly multiplying the seasoning line along with everything else.
Cooking time. A doubled roast doesn't take double the time — the ratio of surface area to volume changes as size increases, so a bigger piece takes proportionally longer for heat to reach the centre, but not by a simple multiplication. Always check doneness properly (Chapter 7's own thermometer discipline) rather than trusting a scaled-up time estimate.

Watch your pan size when scaling up Doubling a stir-fry recipe in the same size pan just recreates Chapter 4's own overcrowded-pan problem — the pan can't hold enough heat for that much food at once. Use a bigger pan, or genuinely cook it in two batches, rather than piling it all in together.

Adjusting for What's Actually in the Fridge

Once you understand the technique behind a dish — not just the specific ingredients listed — a recipe becomes a flexible pattern rather than a rigid instruction set. A stir-fry recipe calling for broccoli can usually take whatever vegetable is actually in the fridge; a soup's aromatics list can flex with what's on hand.

The exceptions are the same ones from earlier in this chapter: don't improvise on baking ratios, and never improvise on food safety — Chapter 2's temperatures and Chapter 7's doneness checks apply regardless of what a recipe happens to say.

Kitchen Practice

Kitchen Practice 1

Read an unfamiliar recipe before cooking anything. Find a recipe you haven't made before. Read it fully first, identify its structure (yield, ingredient groupings, shorthand terms), and note anything that needs prepping ahead — before you touch a single ingredient.

→ Solution

Kitchen Practice 2

Scale a recipe, sensibly. Take a recipe from earlier in this course and scale it up or down — adjusting seasoning by taste rather than blind multiplication, and checking whether your pan or pot size can actually handle the scaled quantity.

→ Solution

Kitchen Practice 3

Substitute an ingredient deliberately. Cook a dish from earlier in this course, but swap one ingredient for something else in your fridge — using the "what job is this ingredient doing" framework to pick a sensible replacement rather than guessing.

→ Solution

Quick Reference — Reading & Adapting Recipes

Read the whole recipe before starting — always
Ask what job an ingredient is doing before substituting it
Baking is unforgiving of substitutions; savoury cooking usually isn't
Seasoning and cooking time don't scale linearly — taste, and check doneness properly
Watch pan size when scaling up, to avoid Chapter 4's overcrowding problem

Next — Chapter 10: Capstone — Building a Weekly Meal Repertoire
Putting everything in this course together into a small, genuinely repeatable set of go-to meals, a real week's plan, a shopping list, and timing more than one dish at once — including fish and chips.