One of the most important functions of eggs is to provide structure and determine texture. We saw this with breads, cakes, cookies, and muffins, with brownies, and also with meringue. But there’s one more category of baked good that depends on eggs: custards and creams. Eggs set and thicken crème brûlée, quiche, cheesecake, pastry cream, and crème anglaise. In this post, we’ll first review how an egg cooks, then explore how different ingredients and techniques affect this process to create smooth custards and creams.
Now that we’ve discussed what eggs do in our baked goods, let’s see them in action! For this experiment, I baked two batches of brownies that were exactly the same, except one batch had less egg than the other.
These buns are a twist on the classic Chinese egg custard buns (奶黃包, nǎihuángbāo). They still have the creamy custard and the fluffy steamed bun, but I added pumpkin and fall spices to both the filling and the dough to create a pumpkin spice version. Notes on ingredient substitutions and the science behind the custard filling, dough, and steaming process follow the recipe!
In the last post, we described proteins as strings of amino acid beads that we reshape when we bake. In this post, we’ll discuss how we manipulate some of the most important factors in protein shape such as water availability, acidity, and temperature, and we’ll explore the chemical effects of these changes.
Proteins are one of the most important molecules in baking. They form the scaffolds of our treats and break down other molecules in our batters and doughs. Proteins are the reason our baked goods solidify in the oven, the reason we boil custards, and the reason we add acid to meringues. In the next few posts, we’ll explore what proteins are, what they do, and how we bake with them.