Step 1

Place the egg yolks and lemon juice into a blender container. Cover, and blend for about 10 seconds.

Step 2

Next, place the butter into a microwave-safe dish and heat for approximately one minute, or until melted and hot. *Make sure the butter stays hot, not lukewarm, for proper emulsion.

Step 3

With the blender at high speed, pour the butter into the blender container in a thin stream until all the butter has been added. The sauce should be thickened and pale yellow.