I have a cake recipe that calls for egg yolks and separately folding in egg whites. What would be the difference in eliminating folding in the whipped egg whites and just using the whole egg? Would it work if I want a "sturdier" cake? That was my thinking but I wasn't certain of the outcome.
Baking – Whole eggs versus folding in egg whites
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The Yolk and White are very different and I would expect to see a significant difference in result.
That isn't to say it will be bad, just different.
The Yolk is the source of fat. It is going to impart flavor to the dish and provide a creamier texture.
The White is mostly protein and so will set more, have more of a texture impact.
If it called for several whole eggs and you wanted to take a Yolk or two out for less fat, that would have less of a variance, but switching several Yolks to several Whites should definitely alter the results.
Extra info:
Here is some nutritional information of a Large Whole/White/Yolk.
http://www.incredibleegg.org/health-and-nutrition/egg-nutrients/nutrient-chart
You will see they both carry protein however the Yolk has almost twice as much fat as protein while the White has less than 2% of fat as it does protein.
This makes their behaviors very different.
While I suppose this is technically possible, I would never consider trying to make this substitution.
Muffins are are form of quick bread. Their structure is based on gelatinized starch from the flour, leavened by chemical leavers such as baking powder or baking soda.
In chiffon cakes, sponge cakes, and angel food cakes, the whipped egg whites or meringue form the primary basis of the structure as a foam with mechanically beaten in air. These batters are much much thinner than quick bread batters, generally, so that the other ingredients can be folded with the egg whites while maintaining the foam.
Instead, I suggest you take a different approach:
- Find a better quick bread recipe--there are many, many good banana muffin recipes easily searchable. If you don't find a muffin recipe you like, you can always use any banana bread recipe for muffins as well, since quick breads and muffins are the same thing, just baked in different shapes.
- Find a recipe for a banana sponge cake or banana chiffon cake. You can always bake these recipes in cupcake form if you like.
Finding a good coherent recipe will almost certainly by easier than trying to adapt a muffin recipe you are not happy with into something else.
If you are really wanting to transform recipes more generally, you need to learn the basis on which they work. You might want to read Michael Ruhlman's Ratio, as a starting point--however, the ratios of ingredients are only part of the story. The other part of the story is the method or technique by which they are prepared.
In the world of cakes and muffins and quick breads, these include the muffin method, the creaming method, the reverse creaming method from Rose Levy Berenbaum, and--I don't know a general name for this method--but the whipped egg whites folded with other ingredients technique.
Each of these methods works optimally with different ratios of ingredients, but also achieves different outcomes with the same ingredients.
So you would have to analyze the individual recipe, adjust the ratio of ingredients, and possibly modify the method by which the ingredients are prepared or combined.
Frankly, to lighten a muffin recipe, I would first ask: are you measuring correctly? Too much flour is going to lead to a dense outcome, and flour is very easy to mismeasure. I would suggest always baking by weight, not volume when you can. Reputable recipe sites for baked goods will tell you the weight of flour in addition to the volume measurement, or at least tell you what the standard weight of a cup of flour is. If no such guide is provided, I find that using a 4.5 oz (US) standard cup for flour is pretty generally successful.
My second approach would be to very, very slightly increase the amount of baking powder, maybe by 1/4 tsp increments in two different trials.
If that fails, you might try reducing the flour by 25% or 50%, but not increasing the number of eggs; instead, change your method from the muffin method to the whipped egg white method, separating the eggs, whipping the egg whites, and then folding them into the other wet ingredients, then gently folding in the dry ingredients.
Still, when you do these kinds of changes, you need to test your recipes, keep careful notes, and so on. I still would start by researching already tested recipes that achieve the outcome you desire.
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Best Answer
I think, as mentioned above, it really depends on how the rest of the recipe goes. If the only source of air youre getting in the cake is from whipping the egg whites then foregoing that may result in very dense cake. However, if there is a step for example that asks you to whisk butter and sugar together until light and fluffy then I think it should be fine to skip it but either way skipping would result in a denser cake.