Why you unbake a cake?

You don't typically "unbake" a cake. Baking is a process of using heat to transform ingredients into a solid, cooked product. Once a cake is baked, it's pretty much set.

However, you might be asking about ways to fix a cake that's been overbaked:

* Fixing a dry cake: You can add moisture back into a dry cake by making a simple syrup (sugar dissolved in water) and brushing it over the cake.

* Fixing a dense cake: If your cake is dense and heavy, you can try to make it lighter by using a cake dehydrator or even leaving it out on the counter overnight.

* Fixing a cake with a crumbly texture: This often happens when the cake isn't properly cooled. You can try to repair a crumbly cake by making a simple icing and spreading it over the top.

If you're having trouble with a cake, it's always helpful to know the exact problem and the steps you've already taken. This will allow for better advice on how to fix it!