What is the difference between simmering and boiling?
Boiling is a full rolling bubble at 212°F (100°C), while simmering is gentle bubbling at about 185 to 205°F (85 to 96°C) used for soups, sauces, and braises.
Why it works
Water cannot get hotter than 212°F (100°C) at sea level, so a hard boil does not cook food faster than a simmer. It just agitates it more. That agitation can break up delicate foods, cloud broth, and toughen meat. A simmer is gentler and often better for flavor and texture.
How to do it
Common mistakes
- Boiling soup or stock hard, which clouds it and can toughen meat.
- Simmering pasta water, which cooks pasta unevenly and makes it sticky.
- Turning the heat all the way down, so nothing is actually cooking.
Questions about simmer vs boil
Does boiling cook food faster than simmering?
Not really. Water tops out at 212°F (100°C), so a simmer is only a little cooler. The harder bubbles just stir the food around.
What does a simmer look like?
You see small bubbles breaking the surface every second or two. The water moves but does not churn.
When should I boil instead of simmer?
Boil pasta, blanch vegetables, and cook anything that needs a fast, strong heat. Simmer everything that needs time to turn tender.
Pasta
Chicken Stock
