Their pancakes come to them already cooked and frozen, they just microwave them when ordered. In South Florida, they are part of the all-day breakfast menu.

McDonald's has changed a lot over the years as when I worked for them in the late 80's to early 90's, we use to make a lot of things in store. The biscuits, pancakes, and scrambled eggs have all been moved out of the store* to a manufacturing facility. Only real eggs are used for the McMuffin sandwiches, otherwise every thing else is made with LEP. The biscuits and pancakes are brought in frozen and heated in store via convection oven or microwave. They say that it's a more consistent product store to store and less labor is used in the store.

*McDonald's does not call their locations restaurants. As much of their products are heat and serve, instead of produced from raw food, I can see why it is a store.