Choose the substitute based on your goal: closest earthy flavor (shiitake/porcini), closest browning texture (portobello/frozen-soaked-dry), or mild coverage (button).
Use the table’s ratio (1:1, ¾:1, or ½:1). For dried porcini, start lighter because it’s stronger.
Slice/torn to a similar size as cremini pieces (thin slices for quick browning; bite-size for stews).
Sauté at high heat until moisture is mostly gone—this is what makes mushroom swaps taste “cremini-like.”
Taste the dish and adjust salt/umami; if it tastes flat, add a pinch more salt or a small splash of soaking liquid (only if using porcini).