* The Earth's crust: This is the outermost solid layer of the Earth. It's what we walk on and where we build our homes. It's made up of different types of rock and is relatively thin compared to the other layers of the Earth.
* The crust of a pie or bread: This is the outer layer of a baked good. It's typically crispy and can be made from different ingredients, depending on the recipe.
It's easy to get confused because both are called "crust," but they are very different things. One is a geological feature, while the other is a culinary one!