Prepare Ingredients

• Ensure all ingredients are at room temperature for proper emulsification.

Start the Emulsion

• In a tall jar or mixing bowl, combine the egg, mustard, lemon juice, and salt.
• If using a blender or immersion blender, pulse the ingredients for a few seconds to mix.

Slowly Add the Oil

• With the blender running on low speed, slowly drizzle in the oil in a thin, steady stream.
• If whisking by hand, whisk continuously while adding the oil drop by drop at first, then gradually increasing.

Blend Until Thick and Creamy

• Continue blending or whisking until the mayonnaise thickens to a smooth, creamy consistency.
• If the mayo is too thick, stir in a teaspoon of water to adjust the texture.

Taste and Adjust

• Add more salt or lemon juice if needed.
• Transfer to an airtight container and refrigerate immediately.