Cooking from what you have

By The Pantry Pro team · 6 September 2026 · Updated 8 September 2026 · 8 min read

A recipe is a list of jobs wearing the names of ingredients. The flour is doing one thing, the egg another, and the parsley stirred in at the end is doing almost nothing structural. A substitution works when the replacement can do the job, and fails when it matches only the description.

Several extension services publish substitution charts. The swaps get remembered; the conditions attached to them do not, and the conditions are the useful part.

Find the closest meal first

A substitution is the second question. The first is which meal you are already closest to, and that is settled by what is in the house.

In Pantry Pro, Cook now ranks the recipes you have saved against the pantry as it stands. The picker at the top, Cook around what you have, narrows the list to recipes calling for up to three things you own and suggests whatever is expiring within the week; two more filters set a time limit and a tolerance for missing ingredients. Fewest missing-or-short ranks first. Each card names what you would have to buy and lists separately the lines it could not verify, because a can't-tell is not a no.

Read the recipe for jobs, not for a shopping list

North Dakota State University Extension states the principle at the top of its chart: each ingredient has a specific function, and swapping one for another may change the taste, color, moisture or texture of the result (NDSU Extension, Ingredient Substitutions, FN198, reviewed January 2023). Colorado State University Extension names four variables — flavor, moisture, texture and weight — and adds that sweetening and thickening power differ enough to need arithmetic (CSU Extension, Ingredient Substitutions, Fact Sheet 9.329, revised January 2013).

Iowa State Extension's account of what happens inside a cookie is the clearest short description of those jobs (Iowa State Extension, How Ingredients Affect "How the Cookie Crumbles", November 2023). Wheat flour's gluten forms a web that catches the air bubbles creaming and leavening put into the dough. Egg proteins set with heat and fix the shape, the yolk's fat adding tenderness and the white adding rise. Sugar draws moisture and slows gluten development. Fats behave differently by state: solid butter traps air during creaming, melted butter and oil take in almost none and give a denser, flatter cookie, and shortening rises higher and stays soft longer. Baking soda needs an acid and reacts once; double-acting baking powder gives more rise and a cakier crumb.

Run that list backwards and it sorts the swaps. Anything that only changes flavor is cheap; anything that changes the state of a fat, the acidity or the amount of water changes the structure, and structure is what the parentheses protect.

The ones that hold

A gap on one of those Cook now cards is a three-way decision: buy the missing thing, replace it with something that can do its job, or cook a different recipe. Only the middle one needs the chart. When the answer is to buy, Add what I need to the shopping list on the recipe page adds the genuine gaps only: what is missing at the full amount, what is short at the shortfall, and nothing you already have. The app has no substitution engine: it matches ingredient names against your items, so pointing a recipe's butter line at the oil in your pantry only tells the app you have butter, and moves the mistake to the stove.

The substitutions the charts agree on, with their amounts:

For	Use
1 cup buttermilk	1 cup minus 1 Tbsp milk plus 1 Tbsp vinegar or lemon juice, left to stand 5 minutes
1 cup butter	7/8 cup oil plus 1/2 tsp salt
1 Tbsp fresh herbs	1 tsp dried herbs, or 1/2 tsp ground
1 Tbsp cornstarch, for thickening	2 Tbsp all-purpose flour
1 tsp baking powder	1/4 tsp baking soda plus 5/8 tsp cream of tartar

Buttermilk

CSU, Utah State and Illinois all give the milk-and-acid version with a five-minute stand (USU Extension, List of Ingredient Substitutions for Cooking and Baking; Illinois Extension, Recipe Substitutions). CSU, Utah State and NDSU also take plain yogurt as a straight one-cup swap; Illinois offers neither that nor the third route, 1¾ teaspoons of cream of tartar in a cup of milk (CSU allows 1¼ to 1¾).

It holds because in most of those recipes the acid is the point: it is what the baking soda reacts with.

One egg's worth

Illinois Extension sorts its egg substitutes by function. For binding, a tablespoon of flax or chia seed with three tablespoons of water, left five minutes. For moisture, a quarter cup of mashed banana, applesauce, pumpkin, beans or silken tofu. For general purposes, two egg whites.

The limits are in the other charts. CSU allows a tablespoon of cornstarch to replace one egg in every three in baking, a cap rather than a ratio to extend. NDSU marks its water-and-baking-powder version for cookies and cakes only, and for custards and cream fillings, where the egg is the structure, offers nothing but more yolks.

Oil for butter

CSU and NDSU both give 7/8 cup of oil plus half a teaspoon of salt for a cup of butter, alongside margarine, lard and hydrogenated shortening. The limit sits in NDSU's entry for melted shortening: a cup of oil replaces a cup of it, and oil should not be substituted where the recipe does not call for the fat melted.

That parenthesis is the whole rule. Liquid fat for liquid fat is nearly free: CSU's sauté entry runs it in every direction, allowing melted margarine, butter, bacon drippings, shortening or lard in place of oil. Liquid fat for solid fat fails wherever the method needs a solid — creaming, cutting into pastry, anything that traps air mechanically. Iowa State's finding is the reason, and it is a matter of degree: the cookie still bakes, it is just flat.

The charts move the salt with it: half a teaspoon added per cup when an unsalted fat replaces butter, half a teaspoon subtracted when butter replaces solid shortening.

Dried herbs for fresh

One to three, dried to fresh, is the general ratio in both charts, and NDSU adds the half-step people skip: a tablespoon of fresh herbs is a teaspoon of dried leaf, but only half a teaspoon of ground.

Individual herbs are not all on that ratio, and the exceptions run one way: CSU puts a quarter cup of chopped fresh mint at a tablespoon of dried, and NDSU a tablespoon of grated fresh ginger at an eighth of a teaspoon of powdered. Where a chart gives a specific pair, use the pair.

Stock from a cube

CSU treats a bouillon cube, a teaspoon of powdered broth base or a teaspoon of instant granules dissolved in a cup of water as a cup of broth, and NDSU gives the cube and the base the same way. For a soup or a braise, that holds.

What a cube does not carry is body. Illinois Extension puts the difference in collagen: a stock made from bones has a fuller mouth feel because collagen turns to gelatin when heated, while a broth is the liquid the meat was cooked in (Illinois Extension, Broth or Stock: What's the difference?, April 2015). A pan sauce meant to coat a spoon is asking for the gelatin.

The ones that fail

The failures are written down too, in the parentheses. CSU's substitute for a cup of heavy cream is a third of a cup of butter with three quarters of a cup of milk, marked for baking only because it will not whip — which rules it out of the dessert that sent you to the chart. NDSU's ricotta-and-yogurt version of cream separates when heated, and its yogurt-for-sour-cream entry survives cooking only with a tablespoon of cornstarch per cup to hold it together.

Sweeteners are the most annotated category in both charts: neither lets corn syrup replace more than half the sugar, and CSU's honey swap is 13/16 cup per cup of sugar, with the liquid cut by three tablespoons and a pinch of baking soda for the acidity. A swap that changes acidity, water or the state of a fat brings a correction with it, and the correction is the part that gets skipped.

The chart is for the unexpected situation

NDSU says so itself, at the top of a twelve-page chart: ingredient substitution is suggested for unexpected situations only. CSU's version is to understand the ingredients' properties and measure accurately.

That sorts into three cases. Substitute freely in anything simmered, stirred or sautéed, where flavor is the variable and nothing structural is at risk. Substitute carefully in anything baked, and read the parentheses first. Where one ingredient is holding the whole thing up — the eggs in a custard, the whites in a meringue, the gluten in a yeast bread — the missing ingredient is a reason to cook something else. A week at a time, that is planning meals around what expires.

Find a recipe using what you have

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