What are those tiny spaces in cakes?

The tiny spaces in cakes are known as air pockets or holes, which are created during the baking process. These pockets form when air is incorporated into the batter through mixing, and they expand as the cake rises in the oven. Proper mixing and baking techniques help achieve a desirable texture, while excessive air pockets can indicate overmixing or improper baking. A well-baked cake should have a light and airy crumb with evenly distributed holes.