Is Portobello Mushroom Keto?

Other Vegetable
Portobello Mushroom sticker illustration
KETO VERDICTYES

Portobellos are a keto-friendly veggie: ~2.6g net carbs per 100g with a meaty texture and rich umami. Their large caps sub in for burger buns or mini pizza bases—just add healthy fats (olive oil, butter, cheese) to hit keto macros.

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YOUR PORTION

How much are you having?

Per 100 g (as listed by source). USDA FoodData Central.

Scales this reference to your portion, with no extra deductions. Calculation and units.

2.6gnet carbs in your portion

Total carbs
3.9g
Fiber
1.3g
Protein
2.1g
Fat
0.4g
Calories
22
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The 100 g reference amount provides 2.6g net carbs and can fit common keto portions.

  • Net carbs (100 g)2.6g
  • Protein (100 g)2.1g
  • Fat (100 g)0.4g
  • Keto verdictKeto-friendly

NUTRITION FACTS

Per 100 g (as listed by source)

Net Carbs
2.6g
Total Carbs
3.9g
Fiber
1.3g
Protein
2.1g
Fat
0.4g
Calories
22

Source: USDA FoodData Central reference record

Source fit: generic reference; variety, brand, or preparation may differ

Net-carb calculation: total carbohydrate - fiber

This USDA record is used as a generic nutrition reference; variety, brand, or preparation may differ.

Nutrition record reviewed 2026-07-09. Maintained by KetoLens Team.

WHY IT'S KETO-FRIENDLY

  • Very low net carbs (~2.6g/100g) fit easily into daily limits
  • Hearty, meaty texture increases meal satisfaction without carbs
  • Large caps work as bun or mini pizza crust substitutes
  • Deep umami flavor reduces need for sugary sauces
  • Low calorie density allows generous portions within targets

PREPARATION SUGGESTIONS

PORTOBELLO BURGER BUNS

Remove stems (and gills if desired), brush with olive oil, and grill until tender. Use as a bun swap with your favorite keto toppings.

GRILLED PORTOBELLO STEAKS

Marinate in olive oil, garlic, and red wine vinegar (or a small splash of balsamic), then grill 4–5 minutes per side. Finish with butter.

STUFFED PORTOBELLOS

Fill caps with spinach, cream cheese, sausage, and parmesan; bake at 375°F for ~25 minutes.

PORTOBELLO PIZZA

Scoop gills if needed, top with marinara, mozzarella, and toppings; bake until cheese melts for a low-carb pizza alternative.

ROASTED

Quarter caps; toss with olive oil, garlic, and herbs; roast at 400°F for 20–25 minutes until caramelized.

PORTOBELLO FAJITAS

Slice and sauté with bell peppers and onions; season with fajita spices and serve in lettuce wraps with sour cream and cheese.

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