One of the biggest reasons mug cakes turn out rubbery is overcooking. Unlike traditional oven-baked cakes, mug cakes cook extremely fast, often in under two minutes. However, if left in the microwave ...

The reason why a cake gets rubbery is that the overmixing of flour activates the gluten. It makes cakes hard instead of the lovely soft spongy texture we associate with a good cake. When you stir your ...