Agaricus bisporus (var. avellaneus)
(J.E. Lange) Imbach
Common Names
Description
The mature, brown-capped strain of Agaricus bisporus. Allowed to open fully until its cap spans up to 15 cm, exposing rich chocolate gills. Its flesh loses moisture and concentrates into a dense, intensely savory 'mushroom steak' perfect for burgers and the grill.
Ecology & Fungal Role
Secondary saprotrophic decomposer of well-aerated composted plant matter and animal manure.
circle Cap (Pileus)
line_weight Hymenium
more_vert Stem (Stipe)
grain Spores
restaurant Flesh & Texture
warning Wild Foraging Safety: Potential Toxic Lookalikes
Gastrointestinal poison. Mature gills turn pale greenish-grey with a green spore print.
potted_plant Recommended Cultivation Methods
- Compost casing kit box: simply let the mushrooms grow past the 'cremini' button stage until the caps fully expand.
light_mode Lighting
Not required (dark tolerant)
air Fresh Air Exchange (FAE)
Generous FAE once caps open to prevent mold on dark mature gills
compost Optimal Substrates & Preparation
- Pasteurized composted straw and manure with calcium carbonate casing
tips_and_updates Practical Grower Tips
- To get giant Portobellos, thin out small surrounding pinheads so 2 or 3 prime specimens absorb all the nutrient energy.
restaurant_menu Flavor Profile
Concentrated umami, roasted meat notes, woods and autumn soil.
skillet Recommended Cooking Methods
- Grilled whole over charcoal with balsamic vinegar and herbs
- Stuffed with cheese, spinach, breadcrumbs, and baked in the oven
- Used as a plant-based burger patty
wine_bar Gourmet Pairings
- Balsamic glaze, rosemary, goat cheese, caramelized onions
- Full-bodied red wines (Syrah, Cabernet Sauvignon, Tempranillo)
kitchen Storage & Preservation
Lasts 7-10 days in the fridge wrapped in paper towels.
menu_book Traditional & Gourmet Recipes
Balsamic Rosemary Grilled Portobello Burgers
25 minutes- 2 large Portobello caps, stems removed
- 3 tbsp balsamic glaze
- 2 tbsp olive oil
- 1 sprig fresh rosemary, minced
- 1 clove garlic, finely grated
- 2 slices provolone or goat cheese
- Brioche burger buns and arugula
Whisk balsamic glaze, olive oil, garlic, rosemary, and a pinch of salt. Brush generous amounts over both sides of the portobello caps and let marinate 10 minutes. Grill or pan-sear on high heat for 5 minutes per side until tender. Top with cheese during the last minute so it melts. Serve on toasted brioche buns with fresh peppery arugula.
