Bloom

To bloom means to soak or warm an ingredient so it is ready to use. The word covers three common jobs: soaking gelatin in cold water, waking dry yeast in warm water, and frying ground spices in fat. In chocolate, "bloom" also names the dull gray streaks that form on old or badly stored bars.

How to do it

For gelatin:

1. Sprinkle the powder over cold water, about 5 times its weight. One 7 g packet takes about 2½ tablespoons (35 ml) of water.
2. Leave it for 5 minutes until it looks like soft, wrinkled jelly.
3. Melt it into a warm liquid, never a boiling one.

For yeast:

1. Stir active dry yeast into water at about 38°C (100°F), warm but not hot to a finger.
2. Add a pinch of sugar and wait 5 to 10 minutes.
3. It should foam on top and smell yeasty.

For spices:

1. Heat a little oil or ghee over medium heat.
2. Add ground spices and stir for 30 to 60 seconds, until fragrant.

Why it works

Gelatin granules dropped straight into hot liquid swell on the outside and leave hard lumps inside. Soaking them first lets each grain take up water evenly. Yeast in water shows you it is alive before you trust it with your flour. Many flavors in spices dissolve in fat, not water, and gentle heat releases them, so a short fry makes the whole dish taste stronger.

Common mistakes

• Using water that is too hot for yeast. Above about 50°C (120°F) it starts to die.
• Boiling bloomed gelatin. It weakens and may not set.
• Leaving spices too long. Ground spices burn in seconds once they darken. Take the pan off the heat as soon as they smell toasted.

In recipes

"Bloom the gelatin" means soak it in cold water. "Proof the yeast" is the same as blooming it. "Bloom the spices" or "cook until fragrant" means a short fry in oil. Instant yeast does not need blooming and can go straight into the flour.