How to Make Your Own Mayo - A Recipe for Mayonnaise  • 1 cup olive oil, vegetable oil or peanut oil • 1 egg • 1 tsp Dijon mustard • 2 to 3 tsp fresh lemon juice or white vinegar • Pinch of salt  1. Put the egg, mustard and salt into the blender.  2. Start the machine  3. Drizzle 1 cup of light oil while the machine is running.  4. After it&#x27;s blended and emulsified, add 2 to 3 teaspoons of fresh lemon juice.  Yield about one cup of mayonnaise. Keeps one week in fridge.