Repairing Broken Mayonnaise

If mayonnaise breaks at any point, it can be brought back together by beating the broken mixture bit by bit into a fresh egg yolk or a small amount of other emulsified liquid such as heavy cream. As soon as this new mixture begins to thicken, the broken mayonnaise can be added more quickly. Mayonnaise, especially traditional mayonnaise made without hydrocolloid thickeners and emulsifiers, frequently breaks when stored overnight in the refrigerator and should be reconstituted before being used.