9 Easy Egg Substitutes for Cake Mix (No Eggs? No Problem!)
Out of eggs and craving cake? Don’t worry. You don’t need to run to the store.
Boxed cake mix is one of the easiest desserts to make. But almost every recipe asks for eggs. So what happens when you don’t have any? Or maybe you’re vegan. Or maybe you just want a lighter, healthier cake.
Good news: your cake can still turn out soft, moist, and tasty without a single egg. Below are 9 simple swaps that work, plus exactly how much to use.
Why Do Cake Recipes Need Eggs?
Before picking a substitute, it helps to know what eggs actually do in a cake. Once you know their job, it’s easy to pick the right replacement.
Eggs do four main things in cake batter:
- Give structure – As the cake bakes, the egg proteins set. This holds the cake together.
- Add flavor – The yolk carries fat, which makes the cake taste rich.
- Add moisture – Eggs are mostly water, so they keep the cake soft, not dry.
- Add nutrition – Eggs bring protein, iron, and vitamins to the mix.
Too few eggs, and your cake may sink or feel flat. Too many, and it can turn tough and rubbery. So when you swap eggs out, you want something that can do a similar job.
The good news is that these swaps work in almost any boxed cake mix, not just homemade recipes. Just match the amount below to the number of eggs your box calls for, and you’re set. Most substitutes work well for up to 2–3 eggs.
If your recipe needs more than that, it’s better to combine two different substitutes (say, half applesauce and half a flax egg) rather than using one type for every egg.
Egg Substitute Chart (Quick Reference)
Here’s a simple table you can save or screenshot. Each amount below replaces one egg.
| Substitute | Amount for 1 Egg | Best For |
|---|---|---|
| Baking soda + vinegar | 1 tsp soda + 1 tbsp vinegar | Any cake, no flavor change |
| Unsweetened applesauce | 1/4 cup | Moist, soft cakes |
| Plain yogurt | 1/4 cup | Protein-rich, dense cakes |
| Silken tofu (blended) | 1/4 cup | Vegan cakes |
| Mashed ripe banana | 1/4 cup | Banana or spice cakes |
| Protein powder + water | 1 tbsp powder + 3 tbsp water | High-protein cakes |
| Ground flaxseed + water | 1 tbsp flax + 3 tbsp water | Nutty, fiber-rich cakes |
| Buttermilk | 1/4 cup | Lemon or tangy cakes |
| Aquafaba (chickpea water) | 3 tbsp | Vegan cakes, egg-white swap |
Now let’s go through each one so you know exactly how to use it.
1. Baking Soda and Vinegar
This is the easiest swap, and most people already have both items at home.
How to use it: Mix 1 teaspoon of baking soda with 1 tablespoon of vinegar in a small bowl. It will fizz right away, that’s normal. Pour it straight into your batter.
The fizzing reaction is what helps your cake rise, just like an egg would. The only downside is that it won’t add any flavor the way eggs do. But if you want a fuss-free option, this is a great place to start.
2. Applesauce
Applesauce is a favorite for a reason: it keeps cakes moist and adds a mild, sweet taste.
How to use it: Swap in 1/4 cup of unsweetened applesauce for each egg.
A helpful tip: don’t use more than 1 cup of applesauce total, even if your recipe calls for several eggs. Too much can make the cake feel rubbery.
3. Plain Yogurt
Yogurt brings protein and a smooth, creamy texture to your batter.
How to use it: Use 1/4 cup of plain yogurt per egg. Plain soy yogurt works too, if you want a dairy-free option.
Keep in mind yogurt doesn’t help the cake rise, so your cake may come out a little denser than usual. Stick to the plain kind so you don’t add extra sugar.
4. Tofu
Silken tofu is a classic pick for vegan baking. It has enough protein to help hold the cake together, and it barely changes the taste.
How to use it: Blend 1/4 cup of silken tofu until smooth and creamy, then mix it into your batter. This replaces one egg.
Try not to replace more than 2 eggs with tofu in one recipe, more than that can weigh the cake down. Also, tofu cakes tend to bake up a little pale, so check for doneness with a toothpick rather than judging by color.
5. Ripe Banana
Mashed banana is another easy, natural swap, and it brings a bit of extra nutrition along with it (think potassium and vitamin C).
How to use it: Use 1/4 cup of mashed ripe banana (about half a small banana) per egg.
Banana also helps your cake brown nicely, so you get good color along with good flavor. Just remember your cake will taste a little like banana, so it works best in banana, spice, or chocolate cakes.
6. Protein Powder
If you want an extra protein boost, unflavored protein powder can step in for eggs.
How to use it: Mix 1 tablespoon of protein powder with 3 tablespoons of water. Stir it into your batter to replace one egg.
Unflavored powder is best since flavored versions (vanilla, chocolate, etc.) can change the taste of your cake. That said, if you don’t mind a little extra flavor, feel free to experiment.
7. Ground Flaxseed
Flaxseed is a favorite in healthy baking because it’s full of fiber and plant protein.
How to use it: Combine 1 tablespoon of ground flaxseed with 3 tablespoons of water. Let it sit for a few minutes until it thickens into a gel, then add it to your batter in place of one egg.
Fair warning: flaxseed has a nutty flavor, so it works better in cakes where a little nuttiness fits in, rather than delicate, plain vanilla cakes.
8. Buttermilk
Buttermilk works a lot like yogurt. It’s acidic, which helps your cake rise and stay soft.
How to use it: Use 1/4 cup of buttermilk per egg.
Since buttermilk has a tangy taste, it’s best saved for cakes that can handle that flavor, like lemon cake, rather than a plain white cake.
9. Aquafaba (Chickpea Water)
If you’ve ever drained a can of chickpeas, you’ve already made aquafaba. This liquid is a go-to egg substitute for vegan bakers because it binds ingredients together almost like real egg whites.
How to use it: Use 3 tablespoons of aquafaba per whole egg, or 2 tablespoons if your recipe only calls for egg whites.
Aquafaba is rich in starch, which helps trap air and gives your cake a light, fluffy texture.
Which Egg Substitute Should You Pick?
Here’s the thing: your cake will taste a little different depending on which substitute you pick, so it’s worth choosing based on what you’re baking. Applesauce and banana add a mild sweetness, flaxseed brings a nutty note, and baking soda with vinegar barely changes the flavor at all. Use that as your guide:
- Baking a lemon or citrus cake? Try buttermilk.
- Baking a sweeter, sugary cake? Plain yogurt works well.
- Baking for a vegan diet? Reach for tofu or aquafaba.
- Want the simplest option with pantry staples? Baking soda and vinegar is quick and works in almost any cake.
- Want extra nutrition? Flaxseed or protein powder are solid picks.
Once you get comfortable with the basics, don’t be afraid to mix two substitutes together. Some bakers combine applesauce with a flax egg to get a better texture, so feel free to experiment and find your own favorite combo.
Final Thoughts
Running out of eggs, following a vegan diet, or just wanting a healthier cake doesn’t mean you have to skip dessert. With any of these 9 swaps, your boxed cake mix can still turn out soft, moist, and delicious.
My personal go-to is baking soda and vinegar, it’s quick, easy, and works in just about any cake. But don’t be afraid to try a few and see which one your family loves best.
Got a favorite egg substitute of your own? I’d love to hear about it.
