Gather the ingredients.

Combine egg yolks, lemon juice, mustard, and hot pepper sauce in the container of a blender; cover and blend for about 5 seconds.

Place butter in a glass measuring cup. Heat butter in the microwave for about 1 minute, or until hot and completely melted.

Turn the blender on; pour melted butter in a slow, steady stream until sauce is thick and smooth, about 15 to 30 seconds.

Serve and enjoy!