How to Make McDonald's Egg McMuffin at Home ~ I can personally attest to this, as I worked at McDonalds as a teen in the Eighties and worked MANY a breakfast and watched the guys cook many Egg McMuffins! This was how the eggs were made back in the "good ol' days"!
What exactly is compound butter? It is softened butter, whipped with various sweet or savory ingredients. While the concept is simple, the potential flavor combinations are endless. How to Make Compound Butter