Hollandaise sauce

Take the egg yolks and pour into a metal/glass dish. This needs to be put on a pot as a double boiler

Pour lemon juice into the eggs

Whisk the eggs together until it's creamy and thick. Try using an electronic whisk because you'll get tired

Put in on the double boiler and carry on whisking

Add in butter and carry on whisking. If it gets too thick, slowly start adding in drops of water until it's thick and smooth

Add in salt and cayenne pepper. Add pepper if you want too

Remove from boiler, whisk a little more then serve immediately