Ingredient substitutions, with the ratio and the trade-off

• 1 tbsp lemon juice or white vinegar topped up to 1 cup with milk. Stand 10 minutes until it curdles.

  Closest match. The acid does the same job of reacting with baking soda and tenderising gluten.

  Best for: Pancakes, biscuits, soda bread, marinades

• ¾ cup plain yogurt thinned with ¼ cup milk or water.

  Slightly thicker and tangier. Adds a little more fat.

  Best for: Cakes, muffins, dressings

• 1 cup milk + 1¾ tsp cream of tartar.

  Works, but whisk the cream of tartar into the dry ingredients or it clumps.

• 1 tbsp ground flaxseed + 3 tbsp water, rested 5 minutes until gelled.

  Binds well, adds a faint nuttiness and a denser, chewier crumb.

  Best for: Cookies, muffins, quick breads, brownies

• ¼ cup unsweetened applesauce.

  Adds moisture and a little sweetness, but no lift. Use for at most 2 eggs.

  Best for: Cakes, muffins, loaf breads

• 3 tbsp aquafaba (chickpea tin liquid), whipped if the recipe wants volume.

  The only swap that whips to a meringue-like foam.

  Best for: Meringue, mousse, macarons, glazes

• ¼ cup silken tofu, blended completely smooth.

  Rich and heavy. Great structure, but it will not lighten a batter.

  Best for: Cheesecake, custards, dense cakes

Won't work: Anything where eggs are the whole dish — omelettes, custard-set quiche, or a sponge that relies on 4+ whipped eggs for its rise.

• ¾ cup whole milk + ¼ cup melted butter, whisked together.

  Matches the fat for cooking, but it will not whip. Fine stirred into sauces and soups.

  Best for: Sauces, soups, ganache, baking

• 1 cup evaporated milk.

  Thinner and slightly cooked-tasting, but stable in heat and won't split.

  Best for: Savoury sauces, gratins

• 1 cup full-fat coconut cream.

  Whips well and stays dairy-free, but carries obvious coconut flavour.

  Best for: Desserts, curries, dairy-free whipped topping

Won't work: Whipped cream from any milk-and-butter swap. Whipping needs ≥30% butterfat held in an intact emulsion.

• 1 cup full-fat Greek yogurt.

  Nearly identical in baking. Slightly tangier and a touch less rich.

• 1 cup crème fraîche.

  Richer and far more heat-stable — it won't split in a hot sauce.

  Best for: Pan sauces, anything simmered

• 1 cup blended silken tofu + 1 tbsp lemon juice.

  Dairy-free and workable, but noticeably flatter in flavour.

• ¼ tsp baking soda + ½ tsp cream of tartar, mixed fresh.

  Chemically equivalent. Mix it in at the last moment — it starts reacting immediately.

• ¼ tsp baking soda + ½ cup buttermilk, with ½ cup of another liquid removed.

  Works, but you have to rebalance the liquid or the batter turns runny.

Won't work: Baking soda on its own. Without an acid it produces almost no lift and leaves a soapy, metallic taste.

• 3 tsp baking powder.

  Triple the amount, and cut added salt slightly. Can leave a faint aftertaste at this dose.

Won't work: Recipes leaning on soda for browning — pretzels, some cookies. Powder is less alkaline, so they come out paler.

• 1 cup margarine or plant butter (choose a stick, not a tub).

  Closest one-to-one. Tub spreads carry extra water and slacken doughs.

• ¾ cup neutral oil.

  Moister and softer, but no creaming, so cakes lose lift and cookies spread flat.

  Best for: Quick breads, muffins, brownies

• 1 cup coconut oil, solid for creaming.

  Behaves like butter structurally. Leaves a mild coconut note.

Won't work: Laminated doughs — croissants, puff pastry, flaky pie crust. Those need butter's specific melting point and water content.

• 1 cup granulated sugar + 1 tbsp molasses, rubbed together with your fingers.

  Indistinguishable from the real thing. Use 2 tbsp molasses for dark brown.

• 1 cup granulated sugar.

  Works, but you lose the moisture and caramel notes — cookies come out crisper and paler.

• 1 cup coconut sugar.

  Similar caramel depth, drier, and it won't pack the same way.

• 1 cup all-purpose flour + 1½ tsp baking powder + ¼ tsp salt.

  Exactly equivalent. Whisk thoroughly so the powder distributes.

• 2 tbsp all-purpose flour.

  Cloudier and slightly pasty. Cook it out for a minute to lose the raw taste.

  Best for: Gravies, roux-based sauces

• 1 tbsp arrowroot or tapioca starch.

  Clearer and glossier. Arrowroot breaks down if boiled hard or held hot.

  Best for: Fruit pies, glazes, freezer-bound sauces

• 1 tbsp potato starch.

  Thickens fast at lower heat. Add it off the boil.

• 1 tsp vanilla bean paste, or ½ a scraped vanilla pod.

  Stronger and visibly speckled. An upgrade in anything pale.

• 1 tsp maple syrup, bourbon, or dark rum.

  Different flavour, but it fills the same aromatic gap in a batter.

• ½ cup chicken or vegetable stock + 1 tbsp white wine vinegar or lemon juice.

  Recovers both the liquid and the acidity that wine was there for.

• ½ cup dry vermouth.

  Arguably better — more aromatic and it keeps for months open.

Won't work: Dishes where wine is the flavour, not a background note — coq au vin, risotto al vino, a proper beurre blanc.

• 1 cup unsweetened oat or soy milk.

  The closest plant swaps for baking — enough protein and body to brown properly.

• ½ cup evaporated milk + ½ cup water.

  Essentially reconstituted milk. Faintly cooked in flavour.

• 1 cup water + 1 tbsp melted butter.

  Emergency only. Fine in bread dough, thin and sad in a custard.

• 1¼ cup granulated sugar + ¼ cup extra liquid from the recipe.

  Honey is sweeter and wetter than sugar, so both sides need adjusting.

• 1 cup maple syrup or agave nectar.

  Direct one-to-one. Maple browns faster, so drop the oven 15°F / 10°C.

• 1 cup crushed crackers, pretzels, or cornflakes.

  Crunchier and saltier — cut the salt elsewhere in the recipe.

  Best for: Coatings, casserole toppings

• 1 cup rolled oats, briefly blitzed.

  Softer. Good as a binder in meatballs, poor as a crust.

  Best for: Meatballs, meatloaf

• 1 cup almond flour or crushed pork rinds.

  The low-carb route. Both brown much faster, so watch the pan.