Best Egg Substitute for Baking

5 different options for egg substitute in sugar cookie compared to control
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Looking for an egg substitute for baking recipes but unsure of the best option? I’ve done the leg work for you to test 5 of the top egg substitutes and I have a clear and surprising winner! Before we get into the results, let’s quickly discuss the methodology. I used a basic low yield sugar cookie recipe to limit wasting too much food- each batch makes ~6 cookies. Please note, that since I used a low yield recipe, the recipe calls for only an egg yolk, not a full egg- this will be important later when we evaluate the color of the cookies. I replaced the egg yolk with the corresponding substitute and made no other changes. I even baked two different types on the same cookie sheet to help ensure equal cooking time.

Let’s meet the Contenders for Best Egg Substitute for Baking

  • Egg Replacer. Made up of potato starch, tapioca flour, baking soda and psyllium husk: 1-1/2 teaspoon + 1 tablespoon water
  • Flax Seed Meal: 1-1/2 teaspoon milled flax seed + 1-1/2 tablespoon water
  • Aquafaba (juice from can of garbanzo beans): 1 tablespoon
  • Apple Sauce: 1/8 cup
  • Club Soda: 1/8 cup
5 top egg substitutes: flax, egg replacer, apple sauce, soda water and aquafaba

Results

Let’s first look at the original, egg yolk, sugar cookie. It has a lovely golden color, a bit more yellow than a traditional sugar cookie because of the use of egg yolk only. The cookie top is slightly crinkled and cookies itself is soft and fluffy with small crunch on the bottom. The cookie has a lovely buttery flavor. Basically your perfect, basic sugar cookie.

Simple low yield sugar cookie recipe
Control: Sugar cookie with Egg Yolk

Lets see how our options faired!

Egg Replacer 7/10

  • The color is the most similar to the traditional recipe, nice and golden, but with a very smooth top. The cookie did not bake up as I would have hoped, resulting in a fairly flat cookie. Since the cookie is so flat, it is not very fluffy and is crispier than I would like.
Sugar cookie using egg replac
Sugar Cookie with Egg Replacer

Flax Meal 2/10

1 tablespoon + 3 tablespoons of water (rested 5 minutes)= 1 large egg

  • My least favorite option by far. It basically failed across all fronts. The flax is visible within the cookie, adding brown specs (not what you want in a sugar cookie!). Additionally, the cookie failed to rise, resulting in a thin, crisp and overly large cookie. The biggest knock against the method is the flavor…. Flax seed definitely has a flavor and that flavor is definitely discernible in the cookie. I imagine that the flax flavor could be hidden in certain baked goods, like a banana bread, but in a cookie, this just doesn’t work.
Sugar cookie with flax meal as egg substitute
Sugar Cookie with Flax Seed Meal

Aquafaba 3/10

3 tablespoons= 1 large egg

  • A close second for my least favorite option. Again, this cookie failed to rise, resulting in a thin, crisp and overly large, flat cookie. The aquafaba didn’t add any flavor, as I had feared. However, the cookie tasted less buttery and was fairly bland. The color of the cookies was a nice golden/ cream, but that’s really the only positive.
sugar cookie with aquafaba
Sugar Cookie with Aquafaba

Apple Sauce 6/10

1/4 cup apple sauce= 1 large egg

  • These cookies weren’t bad, they were as soft as the control cookie with similar texture. However, the color was a darker tan rather than a creamy color. Additionally, there was a little bit of apple flavor added to the cookie. Depending on what you’re baking, this could easily be concealed, but in a sugar cookie, it’s hard to hide the apple flavor
Sugar cookie apple sauce egg substitute
Sugar Cookie with Apple Sauce

Soda Water/ Club Soda 10/10

1/4 cup club soda = 1 large egg

  • I actually prefer this method to the traditional egg yolk. The cookies were fluffier and softer than the control cookie with zero flavor lost (read: lots of buttery sugar cookie goodness!). The only other difference is the color. These cookies were lighter in color, but I feel that they are consistent with a traditional sugar cookie color. Again, the control called for only an egg yolk, rather than a full egg, resulting in the control being a bit more yellow than a traditional cookie.
Sugar cookie with club soda as egg substitute
Sugar Cookie with Club Soda

So what do you think? Are you surprised? Let me know your favorite egg substitute!

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