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Out of Eggs, one case

Egg substitute for brownie mix

5 options, ranked, with the exact amount

Use thisBest of 5 options

Use Flax egg

1 tbsp flax + 3 tbsp water for every egg

For each egg in a box of brownie mix, use a flax egg (1 tablespoon ground flaxseed stirred into 3 tablespoons water) or ¼ cup of plain yogurt. Both keep brownies fudgy. Applesauce works too but makes them cakier. Egg-free brownies set as they cool, so do not cut them warm.

Verdict —
Tweak it
The tweak —
Stir and rest 5 minutes to gel before adding.
Best for —
fudgy box brownies

One casethe full eggs card

Every option, one card

Ranked
Eggs substitutes compared
SubstituteInstead of 1 egg
Flax eggfudgy box brownies1 tbsp flax + 3 tbsp waterTweak it
Plain yogurtbox brownie mix¼ cupTweak it
Unsweetened applesaucecakey brownies¼ cupYou'll taste it
Aquafabavegan brownies3 tbsp + 1 tsp oilTweak it
Silken tofuextra-fudgy brownies¼ cupTweak it
What changes5 options

Flax egg

none you will notice under the chocolate; dense and fudgy

A sticky gel that binds like egg. Chocolate hides its color and nutty taste.

Best for
fudgy box brownies, vegan brownies
Prep
Stir and rest 5 minutes to gel before adding.
Suits
vegan
Where it fails
Cake-style brownies that should rise.

Plain yogurt

none; moist

Moisture and a little protein. Gives a soft, fudgy center.

Best for
box brownie mix, brownie cupcakes
Contains
dairy
Where it fails
A crackly, shiny top, which comes from eggs and sugar beaten together.

Unsweetened applesauce

very slight fruit note; cakier

Binds and adds moisture, with a lighter, cake-like result.

Best for
cakey brownies, lower-fat brownies
Suits
vegan
Where it fails
Dense, chewy brownies.

Aquafaba

neutral taste

Chickpea liquid. It binds and, whisked until foamy, can bring back some of the shiny top.

Best for
vegan brownies, chewy brownies
Prep
Whisk the aquafaba until foamy, about 30 seconds, then stir it in with the oil, which stands in for the fat of the yolk.
Suits
vegan
Where it fails
Nothing in particular.

Silken tofu

neutral; very dense

Blended smooth, it gives a dense, truffle-like brownie.

Best for
extra-fudgy brownies
Prep
Blend completely smooth before adding.
Suits
vegan
Where it fails
Light or cakey brownies.

Tips for substituting eggs

4 tips
  1. Most mixes call for 1 or 2 eggs for fudgy and 3 for cakey. Replace the fudgy number.
  2. Bake 3 to 5 minutes longer than the box says and test near the edge, not the center.
  3. Cool completely, at least 1 hour, before cutting. Chilling 30 minutes gives the cleanest squares.
  4. Line the pan with parchment with an overhang so you can lift the slab out whole.

Questions

4 questions

What can I substitute for 2 eggs in brownie mix?

2 flax eggs (2 tablespoons ground flaxseed in 6 tablespoons water) or ½ cup plain yogurt.

Can I make box brownies without eggs?

Yes. Brownies are forgiving because they do not need much rise. Use a flax egg, yogurt, applesauce or aquafaba for each egg.

Can I use mayonnaise instead of eggs in brownies?

Yes, 3 tablespoons per egg, and reduce the oil in the mix by 1 tablespoon. Regular mayonnaise contains egg.

Why are my eggless brownies gooey in the middle?

They need longer in the oven and they firm up as they cool. Bake a few minutes more and let them cool fully before cutting.