The encyclopaedia of gravy
Fond is the dark, caramelised layer of meat juices that dries onto a hot pan. It is the most flavour-dense material in gravy-making and dissolves readily in liquid.
Fond is French for foundation, and that is exactly what it is.
How it forms¶
Juices escaping from meat hit hot metal and the water in them evaporates immediately. What is left — proteins, sugars, dissolved minerals — continues to heat, browns through the Maillard reaction, and dries into a thin, dark, sticky layer welded to the pan.
Why it matters¶
The Maillard reaction produces hundreds of aromatic compounds: roasted, nutty, meaty, savoury. The fond is where they are most concentrated. Gram for gram it is the most flavourful substance in a roast.
Crucially, most of those compounds are water-soluble, so any liquid plus heat and agitation will lift them straight off the metal and into your gravy. That is deglazing a roasting tin.
Good fond and bad fond¶
| Good | Bad | |
|---|---|---|
| Colour | Deep brown, glossy | Matte black |
| Smell | Roasted, sweet, savoury | Acrid, sharp |
| Taste | Intense, meaty | Bitter |
| What to do | Deglaze it | Scrape it out and discard |
The transition from one to the other is quick, and it happens most often in a tin that is too big for the joint, or one left over direct heat while the cook is doing something else.
Fond without meat¶
Roasted vegetables — onions, carrots, squash, tomatoes, mushrooms — produce fond too, through the same reaction plus caramelisation of their sugars. This is the foundation of a good vegetarian gravy, and the reason vegetarian gravy recipes insist on browning the vegetables far more than seems necessary.
Protecting it¶
- Roast on a trivet so juices do not sit directly under the meat and steam.
- Never add water mid-roast.
- Use a heavy tin — thin ones develop hot spots and burn the fond in patches.
- Do not wash the tin before making gravy. This needs saying.