Baking Substitutes: Eggs, Butter, Dairy, Oil

Short answer: the best baking substitutes match the original ingredient on three things: fat, acid, and moisture, and every reliable swap below is built on that rule. Most baking substitutes lists just hand you ratios. This one goes further: for each swap you’ll get the exact ratio, its weight in grams, what it does to texture and flavor, and a risk rating that tells you whether it’s safe anywhere or strictly a last resort.

One habit that makes every substitution more reliable: measure by weight. A “cup” of packed brown sugar and a loose one can differ by 30 grams, and that gap is often bigger than the difference between the real ingredient and its stand-in. The cups to grams converter gives you the gram weight of any ingredient in seconds.

Why do some baking substitutes work and others flop?

Baked goods aren’t forgiving the way soups are, because baking is chemistry with a timer. Every major ingredient does at least one structural job, and a substitute succeeds or fails based on whether it covers that same job. There are three variables that matter:

Fat carries flavor, shortens gluten strands (that’s where “shortening” gets its name), and controls spread. Butter is about 80% fat, oil is 100%, and yogurt is around 3%. Swap one for another without adjusting and the texture shifts.

Acid reacts with baking soda to create the carbon dioxide that lifts your batter. Buttermilk, sour cream, yogurt, and lemon juice are all acidic. Replace an acidic ingredient with a neutral one and your quick bread can come out dense and slightly soapy tasting, since unreacted baking soda has a bitter, metallic edge.

Moisture determines crumb and bake time. Applesauce is mostly water; butter is barely 16% water. Trade fat for fruit puree and you’ve made the batter wetter, which is why those bakes need extra minutes in the oven.

Keep those three in mind and the tables below stop being rules to memorize and start making sense on their own.

What can you use instead of eggs in baking?

Eggs bind, moisturize, and lift. No single substitute does all three, so pick based on which job the egg was doing. In cookies and brownies it mostly binds; in cakes it also lifts.

Substitute (per 1 egg)	Amount	Weight	Texture effect	Best for	Risk
Flax egg (ground flax + water)	1 tbsp flax + 3 tbsp water	7 g + 45 ml	Slightly denser, nutty note	Cookies, muffins, pancakes	Safe anywhere
Unsweetened applesauce	1/4 cup	61 g	Moister, softer crumb	Cakes, quick breads	Sturdy bakes
Mashed ripe banana	1/4 cup	57 g	Moist, adds banana flavor	Muffins, pancakes	Sturdy bakes
Plain yogurt	1/4 cup	61 g	Tender, slightly tangy	Cakes, muffins	Sturdy bakes
Mayonnaise	3 tbsp	41 g	Rich, very tender	Chocolate cakes	Sturdy bakes
Carbonated water	1/4 cup	60 ml	Lighter, airier	Pancakes, waffles	Last resort

Two limits worth knowing. First, substitutes stop working past two eggs; a recipe with three or more needs eggs to hold together, and no puree will save it. Second, none of these whip. Meringues, sponge cakes, and souffles are off the table (aquafaba, the liquid from a can of chickpeas, is the one exception, whipped at 3 tablespoons per egg).

If your recipe lists eggs by weight, a large egg without the shell is about 50 grams, which helps when you’re converting the rest of the recipe to grams anyway.

What’s the best butter substitute for baking?

First check how the recipe uses butter. Melted butter is acting as a liquid fat, so oil slides right in. Softened butter creamed with sugar is doing something oil can’t: holding millions of tiny air pockets that become your cake’s lift. For creaming, you need another solid fat.

Substitute (per 1 cup butter)	Amount	Weight	Texture effect	Best for	Risk
Vegetable oil (melted butter only)	3/4 cup	165 g	Moister, denser, less flavor	Brownies, quick breads	Safe anywhere
Shortening	1 cup	190 g	Taller, softer, blander	Cookies, frosting	Safe anywhere
Coconut oil (solid)	1 cup	218 g	Similar spread, faint coconut	Cookies, bars	Sturdy bakes
Greek yogurt	1/2 cup	123 g	Denser, tangy, less rich	Muffins, snack cakes	Sturdy bakes
Mashed avocado	1 cup	230 g	Dense, fudgy, greenish tint	Brownies, chocolate cake	Last resort
Margarine (80% fat sticks)	1 cup	227 g	Nearly identical	Anything	Safe anywhere

The oil ratio trips people up, so here’s the logic: butter is roughly 80% fat and 16% water, while oil is all fat. Using 3/4 the volume of oil matches the fat and skips the water butter would have contributed. A stick of butter, for reference, is 113 grams; the cups to grams converter covers butter, oil, and shortening if your recipe mixes units.

Skip whipped or “light” tub spreads entirely. They’re cut with water and air, and cookies made with them spread into puddles.

How do you make a buttermilk substitute?

This is the most searched baking swap of them all, and luckily it’s the most reliable. Buttermilk brings two things: acidity that activates baking soda, and a tang that flavors the crumb. Any acidic dairy stand-in covers both.

Substitute (per 1 cup buttermilk)	Amount	Weight	Stand time	Risk
Milk + lemon juice or white vinegar	1 tbsp acid, milk to 1 cup	245 g	5-10 min	Safe anywhere
Plain yogurt thinned with milk	3/4 cup yogurt + 1/4 cup milk	245 g	None	Safe anywhere
Kefir	1 cup	245 g	None	Safe anywhere
Sour cream thinned with milk	3/4 cup + 1/4 cup milk	240 g	None	Sturdy bakes
Milk + cream of tartar	1 3/4 tsp per cup	245 g	5 min	Sturdy bakes

The soured-milk version won’t thicken like true buttermilk, and that’s fine. The chemistry is what matters: the acid neutralizes baking soda on contact, releasing carbon dioxide right in the batter. That’s also why you shouldn’t sub plain milk for buttermilk without adding acid. The soda would have nothing to react with, your pancakes would come out flat, and the flavor would carry that faint bitter edge of unreacted soda.

Measuring the acid accurately matters more here than anywhere else in this guide; 1 tablespoon is 15 ml, and the tablespoons to milliliters converter sorts out any recipe written in metric.

What can replace sour cream and heavy cream?

These two dairy workhorses fail differently, so they get one table each. Sour cream is thick, acidic, and about 20% fat. Its nearest twin sits next to it in the dairy case.

Substitute (per 1 cup sour cream)	Amount	Weight	Texture effect	Risk
Whole-milk Greek yogurt	1 cup	245 g	Nearly identical	Safe anywhere
Plain whole-milk yogurt	1 cup	245 g	Slightly thinner batter	Safe anywhere
Creme fraiche	1 cup	240 g	Richer, less tang	Safe anywhere
Cottage cheese, blended smooth	1 cup	226 g	Less rich, more protein	Sturdy bakes
Buttermilk	3/4 cup	184 g	Thinner; reduce other liquid	Last resort

Heavy cream is the opposite problem: it’s not acidic at all, it’s just very fat, around 36%. Substitutes need to rebuild that fat.

Substitute (per 1 cup heavy cream)	Amount	Weight	Whips?	Risk
Milk + melted butter	3/4 cup milk + 1/4 cup butter	240 g	No	Safe anywhere
Evaporated milk	1 cup	252 g	Chilled, briefly	Sturdy bakes
Half-and-half + melted butter	7/8 cup + 2 tbsp butter	240 g	No	Safe anywhere
Full-fat coconut cream, chilled	1 cup	240 g	Yes	Sturdy bakes
Whole milk alone	1 cup	244 g	No	Last resort

The milk-plus-butter trick handles batters, ganache, custards, and pan sauces without anyone noticing. Whipping is the hard boundary: below roughly 30% fat, cream physically can’t trap air. Chilled coconut cream is the only substitute on the list that genuinely whips into stable peaks.

Which milk substitutes bake well?

Milk is the easiest ingredient here, because in most batters it’s mainly providing moisture with a little fat and protein. Nearly anything pourable and unsweetened works cup for cup.

Substitute (per 1 cup milk)	Amount	Weight	Notes	Risk
Unsweetened soy milk	1 cup	243 g	Closest protein match, best browning	Safe anywhere
Unsweetened oat milk	1 cup	240 g	Neutral, slightly sweet	Safe anywhere
Unsweetened almond milk	1 cup	240 g	Thinner, mild nut note	Safe anywhere
Canned coconut milk (light)	1 cup	240 g	Richer, faint coconut	Sturdy bakes
Water + melted butter	1 cup water + 1 tbsp butter	250 g	Emergency fix	Last resort
Evaporated milk + water	1/2 cup each	246 g	Nearly identical to milk	Safe anywhere

Two cautions. Sweetened or vanilla-flavored plant milks add sugar and flavor you didn’t plan for, so always grab the unsweetened carton. And in recipes where milk is the star, like custards or bread pudding, soy milk holds up best because its protein content is closest to dairy’s, which affects both set and browning.

What about oil, sugar, and leavening swaps?

The remaining pantry emergencies bundle nicely. These come up constantly in the search data: oil substitutes, brown sugar fixes, and the baking soda versus baking powder math.

You’re out of	Use instead	Ratio	Weight	Risk
Vegetable oil	Melted butter	1:1	227 g/cup	Safe anywhere
Vegetable oil	Unsweetened applesauce	1:1, reduce sugar slightly	244 g/cup	Sturdy bakes
Brown sugar	White sugar + molasses	1 cup + 1 tbsp	200 g + 20 g	Safe anywhere
Baking soda	Baking powder	1 tsp soda = 3 tsp powder	4.8 g = 13.8 g	Safe anywhere
Baking powder	Soda + cream of tartar	1/4 tsp soda + 1/2 tsp tartar per tsp	4.6 g/tsp	Safe anywhere
Cake flour	AP flour + cornstarch	1 cup minus 2 tbsp AP + 2 tbsp starch	120 g	Safe anywhere

The 3:1 rule for leavening deserves a note, because it only runs one direction safely. Baking powder is baking soda pre-mixed with its own acid, so it works in any batter. Baking soda alone needs an acidic ingredient already in the recipe to wake it up. If the batter has buttermilk, yogurt, brown sugar, or cocoa, soda can stand in for powder at one third the amount. In a neutral batter it just sits there, and your cake stays flat.

Applesauce for oil is the one swap in this table where reading the batter matters. It works beautifully in muffins and snack cakes but turns brownies cakey and gummy, since brownies rely on fat for that dense chew.

The swap risk cheat sheet

Ratios answer “how much.” This table answers the question competitors’ lists skip: “how likely is this to actually work?” Pin it somewhere useful.

Risk level	What it means	Examples
Safe anywhere	Behaves like the original in any recipe	Soured milk for buttermilk, Greek yogurt for sour cream, oil for melted butter, sugar + molasses for brown sugar
Sturdy bakes	Fine in muffins, quick breads, cookies; risky in delicate cakes	Applesauce for eggs or oil, coconut oil for butter, evaporated milk for cream
Last resort	Gets a bake out of the oven, expect a texture change	Carbonated water for eggs, plain milk for cream, buttermilk for sour cream

A good rule when you’re stacking substitutions: one “safe anywhere” swap plus one “sturdy bakes” swap is usually fine, but two “sturdy bakes” swaps in the same recipe compound each other. Swapping both the eggs and the butter in a delicate cake is how you end up with a dense, wet brick.

Substitution is also where weighing ingredients pays off most, because every table above assumes an accurate starting measurement. If your cups tend to be a little generous, the full cups to grams baking chart shows the correct gram weight for 25+ ingredients, and the converter itself does the math for odd amounts. Weigh the swap, respect the risk rating, and most “I was out of it” bakes come out close enough that nobody at the table asks questions.