Butter, applesauce, and yogurt all work in place of oil
Oil keeps brownies moist and tender, but you can swap it for butter, unsweetened applesauce, Greek yogurt, mashed banana, or even mayonnaise—each one produces a slightly different texture and flavor. The most common swap is butter, which gives you a richer, more cake-like brownie. Applesauce makes them denser and slightly less rich. Greek yogurt keeps them fudgy while cutting fat. The choice depends on what you have on hand and what texture you want.
The basic rule is a 1-to-1 swap by volume: if a recipe calls for 1 cup of oil, use 1 cup of your replacement. Some replacements are wetter than oil, so you may need to reduce other liquids slightly or add a bit more flour if the batter looks too thin. Start with the 1-to-1 ratio, bake, and adjust next time if needed.
Key Takeaways
- Butter creates a richer, more cake-like brownie and is the closest match to oil in texture.
- Applesauce and Greek yogurt both work 1-to-1 but produce denser, less rich brownies with less fat.
- Mashed banana and avocado add moisture but will change the flavor noticeably.
- Mayonnaise works because it is mostly oil and eggs, but use it only if you do not mind a subtle tangy note.
Butter: The closest replacement
Butter is the most reliable swap and produces results closest to the original recipe. Use melted butter in a 1-to-1 ratio—if the recipe calls for 1 cup of oil, melt 1 cup of butter and use it the same way. Brownies made with butter tend to be slightly more cake-like and less fudgy than oil-based ones, but the difference is small.
The only catch is that butter contains water (about 15 to 20 percent), while oil does not. If your batter looks noticeably thinner than it should, add a tablespoon or two of flour. Most home bakers do not notice enough difference to bother, but if you are making a recipe that relies on a very specific texture, this matters.
Applesauce: For a denser, less rich brownie
Unsweetened applesauce replaces oil 1-to-1 and produces a brownie that is denser, less rich, and slightly more cake-like. The applesauce adds moisture and sweetness, so some bakers reduce the sugar in the recipe by a tablespoon or two, though this is optional. The brownies will be good either way.
Applesauce works because it is mostly water and fiber, which keeps the brownie moist without the fat. The trade-off is that you lose some of the fudgy richness oil provides. If you want a brownie that is still tender but less indulgent, this is a solid choice. Sweetened applesauce also works, but unsweetened gives you more control over the final sweetness.
Greek yogurt: For fudgy brownies with less fat
Plain Greek yogurt swaps 1-to-1 for oil and keeps brownies fudgy while cutting the fat content significantly. The yogurt adds tang and moisture, which actually helps the chocolate flavor stand out. Some bakers reduce the liquid in the recipe slightly (by 2 to 3 tablespoons) because yogurt is thicker than oil, but many skip this step and get good results anyway.
Greek yogurt works best in recipes that already have some acidity—chocolate and cocoa powder are both slightly acidic, so they pair well with yogurt's tang. The brownies will be slightly less rich than oil-based ones but still fudgy and moist. This is a good choice if you want to lower fat without sacrificing texture.
Mashed banana and avocado: For moisture with flavor change
Mashed banana and avocado both replace oil 1-to-1 and keep brownies very moist. Banana adds sweetness and a subtle fruity note—some people love it, others find it distracting in chocolate brownies. Avocado is nearly flavorless and produces a very fudgy brownie, but it is less common and more expensive.
Both of these are wetter than oil, so reduce other liquids in the recipe by 2 to 3 tablespoons or add a bit more flour if the batter looks too thin. Banana works better in recipes that already have vanilla or coffee flavors, which complement it. Avocado is more neutral but requires you to have one on hand and use it quickly before it browns.
Mayonnaise: An unexpected but functional swap
Mayonnaise is mostly oil and eggs, so it works as a 1-to-1 replacement and produces a brownie that is nearly identical to an oil-based one. The egg yolks add richness and help bind the batter. Most people cannot taste the mayo in the final brownie, though some detect a very subtle tangy note.
This swap is useful mainly if you have mayo on hand and no oil. It is not worth buying mayo just to make brownies. Use plain mayo, not flavored varieties. The brownies will be slightly richer than oil-based ones because of the egg yolks, which is a bonus.
Coconut oil and other oil swaps
If you have a different oil on hand—coconut, canola, vegetable, or olive—you can use it 1-to-1 in place of the oil the recipe calls for. Coconut oil produces brownies with a subtle coconut flavor and a slightly different texture because it solidifies at room temperature. Olive oil works but adds a noticeable fruity or peppery note that most people do not want in brownies.
Canola and vegetable oil are neutral and work identically to the oil in the original recipe, so there is no reason to swap them unless you are out of the specified oil. If you use coconut oil, make sure it is melted before mixing it into the batter, and be aware that the brownies may set up slightly differently as they cool.
How to adjust if the batter looks wrong
After you mix in your replacement, look at the batter. It should be thick but pourable—similar to cake batter. If it looks too thin and soupy, add a tablespoon of flour at a time until it thickens. If it looks too thick and stiff, add a teaspoon of water or milk and stir.
Most replacements work without adjustment, but applesauce and yogurt are wetter than oil, so they are more likely to need a bit more flour. Banana and avocado are also wet. Butter and mayo are close enough to oil that they rarely need adjustment. Bake at the temperature and time the recipe specifies—the brownie should pull away slightly from the sides of the pan and a toothpick inserted in the center should come out with a few moist crumbs, not wet batter.
Frequently Asked Questions
Can I use coconut oil if the recipe calls for vegetable oil?
Yes, use it 1-to-1. Coconut oil will add a subtle coconut flavor and may change the texture slightly because it solidifies as it cools. The brownies will still taste good, but they will not be identical to the original recipe.
Do I need to reduce sugar if I use applesauce?
No, it is optional. Applesauce adds some sweetness, so reducing the sugar by a tablespoon or two can prevent the brownies from being too sweet. But most bakers skip this step and get good results. Taste the batter if you are unsure.
Will brownies made with yogurt taste tangy?
Not noticeably. The chocolate and cocoa powder mask the yogurt's tang. Some people detect a very subtle sourness, but most do not. If you are sensitive to tangy flavors, use Greek yogurt rather than regular yogurt because it is milder.
What if I use mashed banana and the brownies taste too fruity?
Reduce the amount of banana next time—use 3/4 cup banana and 1/4 cup applesauce or yogurt instead of a full cup of banana. Or add a teaspoon of when ready coffee powder to the batter to mask the banana flavor with a deeper chocolate note.
Can I mix two replacements together?
Yes. You can use half butter and half applesauce, or half yogurt and half mashed banana. This lets you balance texture and flavor—for example, half butter and half applesauce gives you richness from the butter and moisture from the applesauce.