Because brown rice requires a relatively long cook time under high pressure, delicate ingredients will completely break down, lose their texture, or lose their vibrant flavors if you put them in the pot from the start. Stirring certain items in right after the pressure release takes advantage of the residual steam without destroying the ingredients.
Fresh herbs and aromatics: Tender herbs like cilantro, parsley, dill, chives, basil, and the green parts of scallions should always go in at the very end. The residual heat will gently awaken their essential oils without turning them brown or bitter.
Citrus juice and zest: High pressure and heat dull the bright acidity of lemon or lime juice and can make citrus zest taste harsh. Folding in fresh zest and juice right before serving gives the rice a clean, lively finish.
Finishing fats and oils: While a basic cooking oil can go in before cooking, premium fats like cold-pressed extra virgin olive oil, toasted sesame oil, chili crisp, or cold cubes of unsalted butter are best stirred in after. They melt into the hot grains, creating a silky mouthfeel and preserving their aroma.
Toasted nuts and seeds: If you cook slivered almonds, toasted walnuts, pine nuts, or sesame seeds in the pressure cooker, they will absorb water and turn soft. Folding them in at the end preserves their crunch and roasted flavor.
Delicate greens and cheeses: Baby spinach, baby arugula, or chopped watercress will wilt perfectly in just sixty seconds if you fold them into the steaming rice and cover the pot briefly. Cheeses such as grated parmesan, crumbled feta, or soft goat cheese also melt beautifully into the residual heat without separating into grease.
I recommend fluffing your rice first with a fork, letting off the initial heavy blast of steam, and then gently folding in your chosen ingredients before placing the lid back on for two to three minutes to let the flavors marry.
