Instructions

  1. Using a blender or electric mixer, blend egg yolks, salt, sugar and 1 tablespoons of the lemon juice.
  2. Slowly pour in 1 cup oil, a few drops at a time, mixing thoroughly.
  3. Add remaining 1/2 cup oil a little faster, carefully blending in each bit before adding the remaining 2 tablespoons lemon juice.
  4. Mix the flour, mustard, boiling water and vinegar together until smooth.
  5. Pour into a small saucepan and cook until smooth and paste-like (but not too thick).
  6. Slowly add this hot mixture to the mayonnaise and blend well.
  7. Pour in a container and cool in the refrigerator.