Two things keep a meatball juicy: fat and a panade —
bread soaked in milk. They do different jobs, and most dry meatballs are missing one or both.
What each one actually does
| Fat | Panade | |
|---|---|---|
| What it is | ~20% of the mince | Bread soaked in milk, squeezed |
| What it does | Bastes the meat from inside | Starch holds water through cooking |
| Without it | Dry however carefully you cook | Dense, tight, squeezes moisture out |
| How to add it | Mix pork into beef; thigh not breast | 1–2 slices per 500 g, 100 ml milk |
| Can the other compensate? | Partly | Partly |
The last row is the useful one. A panade rescues moderately lean mince,
and plenty of fat forgives a missing panade. Skip both and nothing else will save it.
Fat: the number to aim for
Around 20%. Pure chicken breast or very lean beef will be dry however
carefully you cook it — there is no technique that substitutes for fat.
Fixes: mix pork into beef, use chicken thigh rather than breast, or add a spoonful of
grated butter to lean mince.
Panade: bread, not breadcrumbs
Per 500 g of mince, a slice or two of white bread with the crusts off, soaked in
100 ml of milk and squeezed lightly. Dry breadcrumbs tipped straight in do
the opposite job — they draw moisture out of the meat.
Three things that undo both
Overworking the mince. Mixing until sticky is right; kneading it like
dough turns the protein springy and squeezes moisture out during cooking.
Cooking too long. Sear for colour, then finish in sauce for
10–15 minutes, not forty. In simmering sauce they are done well before they
look it.
No sauce at all. Meatballs finished in sauce keep visibly more moisture.
If you are frying them plain, take them out earlier than feels right.
And one small choice that helps
Grate the onion rather than chopping it — grated onion releases juice into the mixture,
chopped stays as pieces. Frying it first trades some of that moisture for sweetness,
which is a fair swap as long as you know you are making it.
See also:
Why meatballs fall apart ·
How long do meatballs last in the fridge ·
Can you freeze bread ·
Why chicken turns dry