Storage: Store dried portobello mushrooms in an air-tight container or zip top bag in a cool, dry, dark cupboard.
Shelf Life: Dried mushrooms will retain their flavor for at least a year, but likely far longer.

For most recipes you’ll want to reconstitute portobella slices before cooking with them.
How to Reconstitute Dried Mushrooms
You can also add dried portobello slices directly to simmering soups, stews, or braising dishes and rehydrate them during the cooking process.
Once rehydrated portobellos are great in stir fried dishes, sautés or added to sauces.Their flavor works well with steaks, chops, poultry, seafood, cheese, pasta, polenta, garlic, lemon, wine and grilled vegetables.
Recipes Suitable for Any Mushroom Variety