In a blender, combine the egg yolks, lemon juice, salt, and cayenne pepper.
Blend on low speed for 10–15 seconds until the mixture becomes pale and slightly thickened.
With the blender running, slowly drizzle in the warm melted butter in a thin stream.
Continue blending until the sauce becomes smooth, thick, and silky.
Taste and adjust with additional lemon juice or salt if needed.
Keep warm until serving. If the sauce becomes too thick, whisk in 1 teaspoon of warm water at a time until it reaches the desired consistency.
The butter should be warm, not scorching hot. Too much heat can scramble the yolks, while butter that's too cool won't create that luxuriously smooth hollandaise every great Benedict deserves.
Place one half of a biscuit on each plate.
Top each half with a crispy fried chicken thigh.
Gently place a poached egg on top of the chicken.
Spoon warm hollandaise sauce generously over the eggs, letting it drip down the sides.
Sprinkle with chives, smoked paprika, or a dash of hot sauce for extra flavor.
Serve immediately while the biscuits are fluffy, the chicken is crispy, and the eggs are silky.