The role of things like butter and milk powder in bakery cakes,

first, to improve the nutritional value of the product.

Then, to enhance and improve the organization of the product.

To give the product a better flavor and color.

Slow down the aging of the bread and so on.

These two ingredients are wanted in specific recipes, but neither of them is indispensable for making breads and cakes.

The basic ingredients for bread are: flour, water, salt, and yeast, and with these four ingredients you can make classic hard French bread.

The basics of a cake are: eggs, sugar, and flour, and with these three ingredients you can also make a regular sponge cake.