Blend the hollandaise: Add the egg yolks, lemon juice, Dijon mustard, salt & desired seasonings to a small food processor or blender. Blend about 30 seconds. The mixture should be very well incorporated & pale yellow in color. With the blender/food processor running, very slowly stream in the hot, melted butter until the hollandaise sauce is creamy, emulsified, & has reached your desired consistency. For a thicker hollandaise, use 6-8 tablespoons butter. For a thinner hollandaise, use 8-10 tablespoons butter.