Toast whole spices
Whole spices store aroma oils inside tiny cells. Heat turns those oils to vapor, so you smell and taste more. A dry pan over medium heat does it in under a minute.
Toast until fragrant
Toast over medium heat for 30 to 60 seconds, shaking the pan. Pull it when the smell goes from dusty to nutty. Past that, the oils scorch and the spice turns bitter.
Test yourself
Questions from the interactive lesson, with the answer and the why.
You toast whole cumin in a dry pan and the kitchen suddenly smells strong. What happened to the seeds?
Aroma oils turned into vapor. Heat vaporizes the stored oils. That vapor is the smell, and it is also what you taste.
True or false: Ground spices go stale faster than whole spices.
True. Grinding breaks the cells, so the oils escape and fade sooner.
What went wrong? You toast cumin on high heat. After a minute the pan is smoking and the seeds are nearly black.
The heat was too high. On high heat the oils scorch within seconds and turn bitter. Medium heat gives you time to stop.
About how many seconds does cumin take to toast over medium heat?
About 45 sec. Cumin is usually fragrant in 30 to 60 seconds on medium heat, and your nose is a better timer than the clock.
Fill the blank: Frying spices in ___ spreads their aroma through the whole dish.
Frying spices in oil spreads their aroma through the whole dish. Many aroma compounds dissolve in fat, so oil carries them through the dish.
Toasted vs raw cumin
Same spice, two bowls. Your nose will pick a winner.
Do the 10-minute experiment