In a moment of inattention, the rice swells, the water foams, and the pot overflows, coating the burner with a sticky film. Many people then reach for their secret weapon: placing a wooden spoon across the pot to calm the boil. A grandmotherly gesture or a genuine kitchen trick, this scene repeats in many family kitchens, without always understanding what is happening at the water’s surface.
Viral videos and recipe sites echo this advice, especially when it comes to rice that is boiling, pasta, or lentils. Some swear it completely prevents overflow, others say it changes nothing. Between a social-media myth and a truly useful move, the truth lies in the middle: the whole story revolves around starch, bubbles, and rising foam.
Why boiling rice overflows the pot so quickly
When you cook rice in a large amount of water, the grains release starch at the surface. This component forms a kind of viscous film that traps air and creates a starch foam, sometimes called foam. According to explanations compiled by Marmiton in April 2025, this bubble layer tends to stick to the water surface, trapping part of the steam produced during cooking.
Once it reaches 100 °C, the boil becomes more intense: steam forms bubbles that rise continuously. They inflate this foam film, which grows in volume. The pressure of the gases trapped beneath this layer pushes the foam toward the edge of the pot. If the vessel is small or too full, the foam spills over and carries some of the cooking water with it.
Wooden spoon on the rice pot: how this trick works
The famous wooden spoon trick involves placing the handle horizontally along the rim of the pot, so that it cuts the surface in two. According to the Spanish site Okdiario and several cooking resources like Ptitchef, the spoon then acts as a small barrier: when the foam rises, it meets the wood, the bubbles burst partially and the foam layer breaks. You gain a few seconds before the liquid reaches the edge.
Why choose a wooden spoon instead of a metal utensil or a rigid plastic? Articles from Top Santé and other media remind that wood has a low thermal conductivity. Practically, the handle does not heat up instantly from the steam, which allows safe handling. A metal utensil can serve the same barrier role for the bubbles, but it heats up much faster and can cause a burn on contact.
Benefits and limits of the wooden spoon with boiling rice
Placing a wooden spoon on the pot brings tangible benefits. Overflow is often delayed, the hob stays cleaner, and there are fewer splashes of boiling water. However, Okdiario notes that this trick does not replace supervision: with very high heat or a pot that is too full, the foam eventually spills over, especially with milk.
For the rice, a few complementary actions really change the game. Top Santé recommends rinsing the rice several times in cold water, until the water is almost clear, to remove part of the surface starch. It is also better to choose a fairly tall pot, fill it to at most two-thirds, place the spoon when the boil becomes vigorous, then lower the heat and stay nearby.
