Ingredients 

• 3 egg yolks
• 1 tablespoon lemon juice , or more as desired for flavor
• 1 teaspoon Dijon mustard
• 1/4 teaspoon salt
• pinch of cayenne pepper
• 1/2 cup unsalted butter or ghee, or more for a thinner consistency, melted and hot

Instructions 

• Melt the butter in a microwave (make sure it's covered as it will splatter) for about 1 minute, until it's hot. Alternatively, you could heat it on the stove.
• Add the egg yolks, lemon juice, dijon, salt and cayenne pepper into a high powered blender and blend for 5 seconds until combined.
• With the blender running on medium high, slowly stream in the hot butter into the mixture until it's emulsified.
• Pour the hollandaise sauce into a small bowl and serve while warm.