This is super simple and comes together in a flash.
Hollandaise is the master recipe and its super simple to make it as is, or make the reduction to change it to bearnaise.
2 egg yolks
4 teaspoons freshly squeezed lemon juice
1/3 teaspoon salt
pinches cayenne pepper
10 tablespoons unsalted butter, melted at 180 degrees
Make this reduction and add to the egg yokes before blending
1/2c White Wine Vinegar
2 sprigs fresh tarragon
1 shallot minced
Add to a pan and cook over medium heat till reduced to 2 tablespoons of liquid. Strain, let cool, then add to the egg yokes before blending.
Add the egg yokes, salt, lemon juice, and cayenne into the immersion blender cup. (add the bearnaise reduction at this point if making bearnaise sauce).
Add the melted butter that is close to 180 degrees to the blender cup
Quickly put the immersion blender into the bottom of the cup and run at high for 10-15 seconds, then slowly raise the blender up from the bottom till all of the liquid is emulsified, approx. 30-40 seconds total.
If bearnaise - mince up some fresh tarragon and stir into the sauce
Hollandaise is a must for Eggs Benedict but also great on fish and veggies. Bearnaise is a steakhouse classic for beef.