Mushroom Gumbo with Extra Dark Roux

Mushroom Gumbo with Extra Dark Roux is a medium Cajun recipe that serves 6. 420 calories per serving. Recipe by W2 KITCHEN on YouTube.

Prep: 15 min | Cook: 1 hr 12 min | Total: 1 hr 42 min

Cost: $16.95 total, $2.83 per serving

Ingredients

  • 8 oz Chestnut Mushrooms (cleaned, cut into bite‑size pieces)
  • 8 oz Shiitake Mushrooms (stems removed, caps sliced)
  • 8 oz King Oyster Mushrooms (cut into 1‑inch thick strips)
  • 1 cup Vegetable Oil (for browning mushrooms and making roux)
  • 1 cup All-Purpose Flour (sifted)
  • 1 large Onion (diced)
  • 2 stalks Celery Stalks (diced)
  • 1 large Green Bell Pepper (diced, slightly more than usual for sweetness)
  • 4 cloves Garlic Cloves (crushed or minced)
  • 2 leaves Dried Bay Leaves (whole)
  • 1.5 tsp Salt (kosher or sea salt)
  • 1 tsp Black Pepper (freshly ground)
  • 0.25 tsp Cayenne Pepper (adjust for heat preference)
  • 4 cup Ice Water (cold to prevent roux clumping)
  • 3 cup Cooked White Rice (for serving)
  • 3 stalks Scallions (Green Onions) (thinly sliced, for garnish)
  • to taste Hot Sauce (optional, for serving)

Instructions

  1. Prepare Mushrooms

    Clean the chestnut, shiitake, and king oyster mushrooms with a damp cloth. Cut chestnut mushrooms into bite‑size pieces, slice shiitake caps, and cut king oyster into 1‑inch strips.

    Time: PT5M

  2. Brown Mushrooms in Batches

    Heat 1/2 cup of vegetable oil in the pot over medium‑high heat. Add chestnut mushrooms in a single layer; do not crowd. Cook until golden on all sides, about 3‑4 minutes. Transfer to wire rack to drain. Repeat with shiitake, then king oyster, adding more oil if needed.

    Time: PT15M

  3. Make the Extra Dark Roux

    Reduce the pot to medium‑low. Add the remaining oil if needed to have about 1 cup total oil. Sprinkle in the sifted flour, stirring constantly with a wooden spoon. Cook, stirring continuously, until the mixture turns a deep chocolate‑brown color (about 20 minutes). Watch closely to prevent burning.

    Time: PT20M

  4. Add the Holy Trinity

    Immediately add the diced onion, celery, and green bell pepper to the dark roux. Stir quickly; the heat will drop, preventing the roux from scorching.

    Time: PT5M

  5. Season and Add Aromatics

    Stir in crushed garlic, dried bay leaves, salt, black pepper, and cayenne. Cook for another 2 minutes.

    Time: PT2M

  6. Gradually Add Ice Water

    Slowly pour the ice water into the pot while stirring to prevent lumps. The cold water lowers the temperature, allowing the starch to gelatinize without clumping.

    Time: PT3M

  7. Simmer the Gumbo Base

    Bring the mixture to a gentle boil, then reduce to a low simmer. Let it cook for 20 minutes, stirring occasionally, until the roux flavor deepens and the broth thickens.

    Time: PT20M

    Temperature: 190°F

  8. Re‑introduce the Browned Mushrooms

    Add all the browned mushrooms back into the pot. Stir to coat them in the dark broth and simmer for an additional 10 minutes so they absorb the flavors.

    Time: PT10M

    Temperature: 190°F

  9. Finish and Serve

    Remove bay leaves. Ladle the gumbo over cooked white rice, garnish with sliced scallions, and serve with hot sauce on the side.

    Time: PT2M

Nutrition Facts

Calories
420
Protein
5 g
Carbohydrates
30 g
Fat
25 g
Fiber
4 g

Dietary info: Vegetarian, Gluten

Allergens: Wheat (flour)

Ingredient Substitutions

  • Instead of Chestnut Mushrooms: Cremini mushrooms
  • Instead of Shiitake Mushrooms: Portobello mushrooms
  • Instead of King Oyster Mushrooms: Large button mushrooms
  • Instead of Vegetable Oil: Canola oil, peanut oil
  • Instead of All-Purpose Flour: Bread flour, whole wheat flour (will affect color)
  • Instead of Onion: Sweet onion
  • Instead of Celery Stalks: Fennel stalks
  • Instead of Green Bell Pepper: Red bell pepper
  • Instead of Garlic Cloves: Garlic powder (1 tsp)
  • Instead of Dried Bay Leaves: Fresh bay leaf (1)
  • Instead of Salt: Table salt (reduce by ¼ tsp)
  • Instead of Black Pepper: White pepper
  • Instead of Cayenne Pepper: Paprika (for milder flavor)
  • Instead of Ice Water: Cold broth for richer flavor
  • Instead of Cooked White Rice: Brown rice, cauliflower rice (low‑carb)
  • Instead of Scallions (Green Onions): Chives
  • Instead of Hot Sauce: Tabasco, Louisiana style hot sauce

Equipment Needed

  • Large Heavy‑Bottomed Pot (Dutch oven)
  • Wire Rack
  • Slotted Spoon
  • Wooden Spoon
  • Chef’s Knife
  • Cutting Board
  • Measuring Cups and Spoons

Critical Steps — Do Not Skip

  • Achieving the extra dark roux without burning – constant stirring and temperature control are essential.
  • Browning mushrooms in hot oil in batches to prevent sogginess and ensure maximum flavor extraction.

Chef Tips from the Video

  • Use a stainless‑steel or cast‑iron pot for even heat distribution when making the roux.
  • For an even deeper flavor, toast the roux a minute longer after it reaches chocolate brown, but watch closely to avoid bitterness.
  • Add a splash of sherry or dry white wine with the water for an extra layer of complexity.

Troubleshooting

Rou x turned grainy or clumped.

Add the flour gradually while whisking continuously; if clumps form, whisk in a little cold water to smooth.

Gumbo is too thick.

Thin with additional ice water, a tablespoon at a time, until desired consistency is reached.

Mushrooms absorbed too much oil and the gumbo is greasy.

Drain browned mushrooms on a wire rack and reserve the oil; discard excess oil before adding water.

Storage

Refrigerator: Store leftovers in an airtight container for up to 4 days.

Freezer: Freeze in a freezer‑safe container for up to 2 months; reheat gently to avoid separating the roux.

Room temperature: Do not store at room temperature; gumbo is perishable.

Make-Ahead Tips

  • The dark roux can be prepared up to 2 days ahead; store in a sealed jar in the fridge and reheat before using.
  • Mushrooms can be browned and refrigerated; reheat in the final simmer step.

Last updated: September 6, 2026

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Mushroom Gumbo with Extra Dark Roux

Recipe by W2 KITCHEN

A hearty, mushroom‑forward gumbo that uses an extra‑dark Cajun roux for deep, coffee‑like flavor. Three types of mushrooms are browned in oil, then simmered in a rich, smoky broth with the holy trinity, garlic, and classic Cajun seasonings. Served over rice and finished with scallions and hot sauce.

MediumCajunServes 6

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Source Video
13m
Prep
1h 9m
Cook
10m
Cleanup
1h 32m
Total

Cost Breakdown

$16.95
Total cost
$2.83
Per serving

Critical Success Points

  • • Achieving the extra dark roux without burning – constant stirring and temperature control are essential.
  • • Browning mushrooms in hot oil in batches to prevent sogginess and ensure maximum flavor extraction.

Safety Warnings

  • • Hot oil can splatter – keep a lid nearby and add mushrooms slowly.
  • • Rouxs can burn quickly; never leave unattended.