The Pantry Swap Guide: How Ingredient Substitutions Really Work

The recipe wants buttermilk. Of course it does. You have milk, and half a lemon rolling around the fridge door. So do you get back in the car, or swap and hope? Neither. Ask one question first: what is that ingredient actually doing in there? Once you know that, almost every gap in the pantry has two or three good answers already sitting on the shelf.

In No. 03 you set up a pantry you can read from the doorway. This is what you do with what you see. No. 02 gave you four quick swaps to save a trip. This one goes all the way, sorted by what each ingredient does: makes it rise, holds it together, adds fat, adds tang, thickens, sweetens, adds savory depth, or adds liquid. Every amount is exact, and every one comes from a trusted kitchen reference, listed at the end.

The HearthIQ ruleSwap what it does, not what it’s called.

An egg in cookies holds the dough together. An egg in a cake also helps it rise. Buttermilk is a liquid and a sour ingredient that gets baking soda going. Swap in something that does the same thing and the recipe won’t notice. Swap in something that just sounds close, and it will. Here’s how to do it, every time.

1. 1

   Step 1: Ask what it’s doing

   What does the missing ingredient do here? Make it rise? Hold it together? Keep it moist? Add tang? Thicken a sauce? Some ingredients do two things at once, and your swap has to cover both.

2. 2

   Step 2: Look at the shelf

   Check the zones from No. 03. The backups for most swaps live in Bulk & backstock and Meals & sauces. Anything already open is in Use first, and that gets picked first.

3. 3

   Step 3: Pick from the list below

   Each section gives you two or more answers with exact amounts. Use whichever one you have the most of, or the one closest to its date.

4. 4

   Step 4: Fix what else changes

   Honey brings water with it. Sour ingredients need baking soda. Oil has no salt. Each swap tells you what to take out or add, so the rest of the recipe stays the same.

5. 5

   Step 5: Write it on the recipe

   A pencil note in the margin — ½ c yogurt + ½ c milk for buttermilk, good — turns tonight’s guess into next month’s plan.

• 1

  Makes it rise — Baking powder, baking soda, self-rising flour, yeast.

• 2

  Holds it together — Eggs, and the crumbs in a meatloaf.

• 3

  Fat — Butter, oil, shortening, lard.

• 4

  Tang — Lemon juice, vinegar, buttermilk, yogurt, sour cream.

• 5

  Thickens — Cornstarch, flour, tapioca, arrowroot, egg yolks.

• 6

  Sweetens — White and brown sugar, honey, maple syrup, molasses.

• 7

  Savory depth — Broth, tomato paste, Worcestershire, mushrooms, mustard.

• 8

  Liquid — Milk, cream, wine, spirits.

1 · Makes it riseBaking soda and baking powder: measure carefully.

Leavening is whatever makes a cake, muffin or biscuit rise. Baking soda can’t do it alone: it needs something sour in the batter — buttermilk, yogurt, lemon juice, vinegar, honey, brown sugar or natural cocoa — to make the bubbles. Baking powder is baking soda with the sour part already mixed in. So every swap here is really putting those two halves back together in the right amounts. Honest advice: if you can avoid swapping these, do. But in a pinch, these work.

2 · Holds it togetherOut of eggs: it depends what the egg was doing.

There’s no one egg swap, because an egg does several things. In meatloaf or cookies it holds everything together. In a cake it also helps it rise. In muffins it keeps them moist. So pick by what the egg was there for. Each line below replaces one whole egg, and the taste or texture may change a little.

3 · FatButter, oil and shortening: solid for solid, melted for melted.

Fat makes things tender and carries flavor. But solid fat and oil do different things. When a recipe beats butter with sugar until it’s fluffy (that’s “creaming”), it’s trapping air in the butter. Oil can’t do that. So the rule is simple: only swap in oil where the recipe melts the fat anyway. And butter usually has salt in it, so a few swaps add a little back.

4 · TangLemon, vinegar, buttermilk: sour does real work.

Sour ingredients brighten flavor, and in baking they’re what gets baking soda going. That’s why plain milk is a poor stand-in for buttermilk in a recipe with baking soda: tested side by side, the cake came out darker and denser. Swap sour for sour. One more thing worth knowing: the simpler the recipe, the more a swap shows. Pancakes and biscuits deserve your best one.

5 · ThickensCornstarch, flour, tapioca: same job, different strength.

These are the easiest swaps, as long as you remember they’re not equally strong. Cornstarch and the other pure starches thicken about twice as much as flour, so you use half as much. Here’s the whole list behind No. 02’s one-line cornstarch swap.

6 · SweetensSugar, honey, maple: mind the extra water.

Sugar sweetens, but it also browns things, keeps them tender, and helps trap air when it’s beaten with butter. Honey and syrups do most of that, but they bring water with them, so the swap always takes a little liquid back out. Honey is sweeter than sugar and browns faster. There are two good ways to swap it, so you get both.

7 · Savory depthBroth, tomato, and the bottles in the fridge door.

This is what makes a soup taste finished instead of just hot. Fewer of these have exact amounts, so here are the ones that do. For soy sauce, fish sauce, miso or Parmesan there’s no tested amount we could find, so we won’t make one up: add a little, taste, add more.

8 · LiquidMilk, cream and wine from the back of the shelf.

No. 02 covered milk from powder and from a can. Here’s the rest of the dairy, plus what to pour when a recipe wants wine or spirits you don’t keep around.

Also on the shelfFlour, spice mixes and the little things.

Make it a habitKeep a swap shelf in the zones you already have.

Most of these swaps run on a handful of things that keep for ages. Give them a home inside No. 03’s zones, labels facing out, so “we’re out of…” gets answered in one glance instead of one car trip. Buy only what your own recipes actually call for; nobody needs a decade’s supply of cream of tartar.

• E

  Bulk & backstock — Instant nonfat dry milk, evaporated milk, cornstarch, cream of tartar, baking soda, a jar of yeast.

• C

  Meals & sauces — Bouillon, tomato paste, a can of tomato sauce, Worcestershire, honey, molasses.

• A

  Use first — The open sour cream, the half lemon, the last of the yogurt. If a swap can use it up, it goes first.

Know when to stopSometimes the store wins.

A swap is for the night you come up short, or a dish where a small difference doesn’t matter. Buy the real thing when the ingredient is the star (buttermilk dressing, a honey cake that should taste of honey), when the recipe is short and simple so everything shows, or when you’d be swapping more than one thing at once. Change one thing at a time, and you’ll know which swap to keep.

Quick referencePin this.

Sources: University of Illinois Extension, Recipe Substitutions · Nebraska Extension, Basic Ingredient Substitutions (reviewed 2026) · Colorado State University Extension, Ingredient Substitutions, Fact Sheet 9.329 · Mississippi State University Extension, Ingredient Substitutions and Equivalents, P1690 (2024) · University of Missouri Extension, Using and Storing Honey · King Arthur Baking: baking soda vs. baking powder, buttermilk substitutes, baking with liquid sweeteners, what to bake if you run out · CDC, Botulism Prevention · America’s Test Kitchen reviews of measuring spoons and liquid measuring cups. Checked October 4, 2026. HearthIQ may earn a commission on product links.