Keto Baked Mushrooms with Spinach and Cheese
These keto baked mushrooms combine a savory spinach and cheese filling with the meaty texture of large mushroom caps. In 20 minutes you have a vegetarian keto dinner on the table that easily fits into your daily limit with just 5 g of net carbs per serving.
Key facts at a glance
- Preparation time: approx. 20 minutes - 10 minutes prep, 10 minutes in the oven.
- Approx. 5 g net carbs and 35 g fat per serving.
- Ingredients: large white mushrooms, baby spinach, Gouda, cream cheese, garlic, olive oil, nutmeg.
- Suitable as a vegetarian keto dinner or as a side dish for meat and fish.
Ingredients
4 large stuffed mushrooms as a main course or 2 as a side dish
| Amount | Ingredient | Note | ||
|---|---|---|---|---|
| White mushroom, large | 4 pieces | |||
| 4 pieces | ||||
| Baby spinach | - | |||
| Gouda, grated | - | |||
| Double cream cheese | or full-fat cream cheese | |||
| or full-fat cream cheese | ||||
| Garlic clove | - | |||
| Olive oil | approx. 1 tbsp | |||
| approx. 1 tbsp | ||||
| Salt | to taste | |||
| to taste | ||||
| Pepper | to taste | |||
| to taste | ||||
| Nutmeg | 1 pinch | |||
| 1 pinch | ||||
Preparation
Hollow out the mushrooms and set aside. Saute the spinach with garlic in olive oil, stir in the cream cheese and fill the mushroom caps. Sprinkle Gouda on top and bake under the oven broiler for 10 minutes until the cheese melts golden brown.
Why baked mushrooms work well on keto
White mushrooms are one of the lowest-carb vegetables available: 100 g of raw mushrooms contain only about 0.6 g net carbs and just 22 kcal. With 200 g of mushrooms per serving, net carbs from the mushrooms alone stay at about 1.2 g. Gouda (50 g) provides about 17 g fat, 12 g protein and under 1 g carbs. Cream cheese (30 g) adds another 8 g fat and 2 g protein. The olive oil (1 tbsp, 14 g) contributes 14 g of pure fat with no carbs. The baby spinach (60 g) has only about 0.5 g net carbs. Together this yields a macro profile of approx. 5 g net carbs, 35 g fat and 22 g protein - a ratio that fits well within a ketogenic daily limit of 20-30 g net carbs. By comparison: traditional stuffed mushrooms with breadcrumbs quickly reach 15-20 g carbs per serving.
Source: FDDB Nutrition Database - White mushrooms, raw , PubMed - Vitamin D2 in UV-exposed mushrooms
Mushrooms as a micronutrient source
In addition to their favorable macro profile, mushrooms supply relevant micronutrients: B vitamins (especially B2, B3 and B5), potassium, selenium and - with UV exposure - also vitamin D2. On a ketogenic diet that restricts many plant foods, mushrooms are therefore one of the best vegetable options for micronutrient intake.
Fitting net carbs into your daily plan
At 5 g net carbs per serving, a 20 g daily limit leaves 15 g for the rest of your meals. If you serve the mushrooms as a side dish with steak or salmon fillet, you can keep the total meal under 8 g net carbs - ideal for strict keto phases.
How do I serve and vary the baked mushrooms?
Serve the mushrooms straight from the oven while the cheese is still molten. A green side salad with olive oil dressing is an excellent match. From experience: a few drops of lemon juice right after baking really bring out the flavors of the mushrooms and spinach.
Meal prep and taking it on the go
The stuffed mushrooms keep in the fridge for 1 day. To reheat, place briefly under the broiler or in the microwave (90 seconds). For meal prep: prepare the spinach and cheese filling separately and only fill the mushrooms on the day of cooking - that keeps the mushrooms firmer.
Variation with other cheese
Instead of Gouda, mozzarella (milder but stringier) or Gruyere (nuttier flavor) also work well. For a dairy-free version: replace the cheese layer with 2 tbsp almond flour mixed with 1 tbsp olive oil and nutritional yeast - it gratinates similarly but has a slightly different aroma.
Which tips help with stuffed mushrooms?
- Choose large white mushrooms (6-8 cm diameter) or portobellos - small ones are hard to fill.
- Don't discard the stems: finely chop them and mix into the spinach filling for more mushroom flavor.
- Preheat the oven on broil before the mushrooms go in - the surface browns faster that way.
- Place the mushrooms on a parchment-lined baking sheet so the released juices don't burn.
- Don't pile the filling too high: it should sit flush with the rim of the mushroom so the cheese melts evenly.
Nutrition values
| Nutrient | Per 100 g | Per serving | Keto context |
|---|---|---|---|
| Calories | approx. 155 kcal | approx. 430 kcal | Filling main meal, fits a keto daily budget of 1600-2000 kcal. |
| Filling main meal, fits a keto daily budget of 1600-2000 kcal. | |||
| Fat | approx. 13 g | approx. 35 g | Main energy source, approx. 73 % of calories - typical for keto. |
| Main energy source, approx. 73 % of calories - typical for keto. | |||
| Net carbs | approx. 1.8 g | approx. 5 g | Low enough for strict keto phases with a 20 g daily limit. |
| Low enough for strict keto phases with a 20 g daily limit. | |||
| Sugar | approx. 0.8 g | approx. 2.2 g | Natural sugar from spinach and mushrooms, no added sugar. |
| Natural sugar from spinach and mushrooms, no added sugar. | |||
| Protein | approx. 8 g | approx. 22 g | Moderate protein content, sufficient as a vegetarian main course. |
| Moderate protein content, sufficient as a vegetarian main course. | |||
| Salt | approx. 0.5 g | approx. 1.4 g | From the Gouda and added salt - on keto, watch your electrolyte intake. |
| From the Gouda and added salt - on keto, watch your electrolyte intake. | |||
Note: Nutrition values are estimated averages per 100 g and per serving and may vary depending on ingredients, brands, portion size, and preparation. They do not replace individual nutrition or medical advice.
FAQ
Are baked mushrooms suitable for keto?
Yes. White mushrooms have one of the best carb profiles of any vegetable at about 0.6 g net carbs per 100 g. With a filling of cream cheese, Gouda and spinach - and no breadcrumbs - the whole serving stays at around 5 g net carbs.
Can I also make the mushrooms without cheese?
Yes. For a dairy-free version, replace the cheese layer with almond flour mixed with olive oil and nutritional yeast. Enrich the filling with a little more olive oil to maintain the fat content.
Do baked mushrooms fit into a keto diet plan for weight loss?
Yes. At 430 kcal and 5 g net carbs, the mushrooms are a filling main meal with moderate calories. The high fat-to-carb ratio supports ketosis and the protein keeps you satisfied.
Which mushrooms work best for stuffed mushrooms?
Large brown mushrooms (6-8 cm diameter) or portobellos are ideal - they have a wide cap with enough room for the filling. Small white mushrooms can be stuffed, but they make better finger food than a main course.