The Silky Insurance Policy
How the ratio of eggs to cream to milk determines whether your custard sets silky or scrambles.
The Silky Insurance Policy
Custard is a protein network suspended in fat and water. Get the ratio wrong and you get scrambled eggs. Get it right and you get silk.
The Science
Egg proteins (primarily ovalbumin and conalbumin) begin denaturing at 140°F / 60°C and fully coagulate around 185°F / 85°C. The fat in cream coats these proteins and slows their coagulation, giving you a wider window of doneness.
The Ratio That Works
For bread pudding specifically: 4 whole eggs + 2 yolks per 3 cups of dairy (2 cups cream + 1 cup milk). This ratio provides:
- Enough protein to set firmly (no jiggle)
- Enough fat to prevent graininess
- Enough water to keep the center moist
The Water Bath Advantage
A water bath (bain-marie) caps the maximum temperature at 212°F / 100°C — the boiling point of water. This prevents the edges from overcooking while the center catches up. For bread pudding, it's optional but recommended for first-timers.
Fred's Internal Temp Rule
"Pull at 140°F internal. The jiggle test is unreliable for home ovens with uneven heat. A thermometer is the only honest answer." — Fred