This
temporary emulsion sauce is formed when one substance
is
suspended in another. It is fragile because it is not
a true mixture and could "break," or separate
into its distinct ingredients (known as curdling). It
begins by producing a 'sabayon'.
Great
care must be taken when making hollandaise as it can curdle
or split very easily, it is a sauce derived from the process
of emulsion and coagulation. Therefore if the butter is
added to quickly or is too hot, the albumen in the egg
will harden, shrink and separate from the liquid.
Should
this happen:
- place
a tablespoon of boiling water in a clean bow
- gradually
whisk in the curdled sauce.
If
this fails:
- put
a fresh yolk in a bowl with a teaspoon of water and
remake a sabayon
- gradually
whisk in the curdled sauce