Great question — answering as the UphillTech team:
An Egg McMuffin is an incredibly simple dish composed of: A plain English muffin (may be lightly toasted) A plain, fried egg with a broken yolk (cooked in a ring) A plain piece of Canadian bacon, straight from the package A plain piece of American cheese, straight from the package There are no dressings, sauces, butters, or anything else added to it. The bare minimum of work is done, as it is a fast food item that must be able to be prepared quickly in larger batches (an auto-toaster and a mass egg form are used). It tasted wrong because you didn't use the right ingredients. Source: Several years working at McDonald's in high school.
Full answer by Allison C: https://cooking.stackexchange.com/a/91482 (CC BY-SA 4.0).
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