01 -
Gently melt the butter in a small saucepan over medium-low heat. You want it completely melted but not bubbling or browning - keep an eye on it!
02 -
In a tall measuring cup or container that fits your immersion blender, combine the egg yolks, water (or asparagus liquid for extra flavor), lemon juice, sugar, and a pinch each of salt and pepper. Blend briefly to combine.
03 -
With your immersion blender running, slowly drizzle in the warm butter in a thin, steady stream. Move the blender gently up and down as you pour to create that perfect silky emulsion.
04 -
Your hollandaise is ready when everything comes together into a smooth, velvety sauce. Taste and adjust seasoning if needed. Serve right away or keep warm in a thermos until ready to use.