Equipment
* optional
Ingredients
Primary Ingredients
- 1000 g cremini mushrooms, cleaned and halved
- 15 ml extra virgin olive oil
- 1 g black pepper, freshly ground
- 2 g fresh thyme, leaves only
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 71 kcal
- Protein
- 5 g
- Carbohydrates
- 9 g
- Fat
- 3 g
- Fiber
- 1 g
- Sugar
- 3 g
- Sodium
- 12 mg
- Saturated Fat
- 0 g
- Monounsaturated Fat
- 2 g
- Polyunsaturated Fat
- 0 g
- Potassium
- 901 mg
- Calcium
- 39 mg
- Iron
- 0.9 mg
- Magnesium
- 19 mg
- Phosphorus
- 241 mg
- Zinc
- 2.2 mg
- Vitamin A
- 1 mcg
- Vitamin C
- 1 mg
- Vitamin D
- 0.2 mcg
- Vitamin E
- 0.5 mg
- Vitamin K
- 2 mcg
- Vitamin B6
- 0.2 mg
- Vitamin B12
- 0.2 mcg
- Thiamin
- 0.20 mg
- Riboflavin
- 0.98 mg
- Niacin
- 7.6 mg
- Folate
- 50 mcg
- Water
- 184 g
Sources: USDA FoodData Central
Method
Preheat your oven to 200 degrees Celsius or 400 degrees Fahrenheit. Line a large baking sheet with parchment paper to prevent sticking.
Place the halved mushrooms in a large mixing bowl. Drizzle with the olive oil, add the black pepper, and toss well until the mushrooms are evenly coated.
Spread the mushrooms evenly on the prepared baking sheet. Ensure they are in a single layer with space between them to allow moisture to evaporate. Roast in the oven at 200 degrees Celsius or 400 degrees Fahrenheit for 35 minutes, tossing halfway through, until they are deeply browned and have shrunk significantly.
Remove the baking sheet from the oven and allow the mushrooms to cool for 10 minutes until safe to handle. Add the fresh thyme leaves if using.
Transfer the cooled mushrooms to a food processor. Pulse several times until the mushrooms are finely chopped into a coarse paste, resembling ground meat. If doing this by hand, mince finely with a chef's knife.
Chef's Notes
- Roasting rather than sautéing the mushrooms requires less fat and concentrates the flavor deeply by driving off excess water in a dry heat environment.
- This base acts as a natural MSG equivalent. Stir a spoonful into gravies, risottos, or marinara sauces to instantly elevate the savory notes of the dish.
- Wipe your mushrooms clean with a damp cloth rather than soaking them in water to prevent them from absorbing extra liquid, which inhibits roasting.
- Because no salt is added during roasting, this base is perfectly low-sodium. Season the final dish you incorporate this into according to taste.
Storage
Refrigerator: 1 week — Store in an airtight container. The surface can be covered with a thin layer of olive oil to extend freshness.
Freezer: 3 months — Pack into ice cube trays, freeze solid, then transfer to a freezer bag for easy portioning.
Troubleshooting
Mushrooms are steaming instead of roasting and browning
Cause: The baking sheet was overcrowded, trapping the water released by the mushrooms
Fix: Carefully drain any pooled liquid from the pan and return to the oven, increasing the cooking time until dry
Prevention: Use two baking sheets if necessary to ensure adequate space between mushroom pieces
The final base is completely mushy and wet
Cause: Mushrooms were not roasted long enough to evaporate their internal moisture
Fix: Transfer the minced mixture to a dry skillet over medium heat and cook until the remaining moisture evaporates
Prevention: Ensure mushrooms are deeply shriveled and dry to the touch before removing from the oven
Cultural Context
This preparation is a modernized, oven-roasted variation of classic French duxelles. Traditional duxelles involves finely chopping raw mushrooms and slowly cooking them down in butter and shallots to form a paste. By roasting the mushrooms first, we achieve an intensely dark, caramelized flavor profile with less hands-on time and significantly less fat, adapting a centuries-old technique for modern, health-conscious utility.
