Walnuts

Store in airtight container away from light and heat. Shelled walnuts go rancid faster than in-shell. Refrigeration or freezing extends shelf life significantly.

High in omega-3 fatty acids (ALA) and antioxidants. Good source of copper, magnesium, and manganese.

Toast walnuts in a dry pan over medium heat for 3-5 minutes to deepen flavor and enhance crunch

Remove papery skin after toasting by rubbing in a clean kitchen towel if less bitterness is desired

Chop walnuts just before using to prevent oil oxidation and maintain freshness

Add to dishes at the end of cooking to preserve texture and prevent excessive softening

Blue cheese and aged cheeses like Parmesan or Gruyère

Apples, pears, figs, and dried fruits

Honey, maple syrup, and brown sugar

Leafy greens like arugula, spinach, and endive

Beets, squash, and roasted root vegetables

Dark chocolate and coffee

Storing at room temperature for too long, leading to rancid, off-flavors from oxidized oils

Over-toasting, which creates burnt, acrid taste; watch carefully as they darken quickly

Using rancid walnuts—always smell before using; fresh walnuts should smell mild and nutty, not painty or sour