Brie and Walnut Stuffed Mushrooms

Brie and Walnut Stuffed Mushrooms

Why This Works for Intermittent Fasting

Mushrooms are one of the few foods that deliver real umami satisfaction without any starch or sugar. Paired with brie — which is predominantly fat with a small amount of protein — and walnuts (one of the best omega-3-to-omega-6 ratio nuts available), this snack packs significant satiety into a small volume. The high fat content keeps insulin stable and hunger at bay, making it ideal for a short eating window when you want something substantial that doesn't disrupt your metabolic state.

Ingredients

• 8 large portobello or cremini mushrooms, stems removed
• 150g brie cheese, rind removed, cut into small cubes
• 40g walnuts, roughly chopped
• 2 tablespoons butter, melted
• 2 garlic cloves, finely minced
• 1 tablespoon fresh thyme leaves (or ½ teaspoon dried thyme)
• Sea salt and black pepper to taste
• Fresh flat-leaf parsley, finely chopped, to serve (optional)

Instructions

1. Preheat the oven to 200°C / 400°F. Line a baking tray with parchment paper.
2. Brush the outside and inside of each mushroom cap generously with melted butter.
3. Season the inside cavity of each cap with sea salt, black pepper, and minced garlic.
4. Divide the brie pieces evenly among the mushroom caps, pressing gently into each cavity.
5. Scatter the chopped walnuts evenly over the brie in each cap.
6. Sprinkle fresh thyme over the top of each mushroom.
7. Bake for 12–15 minutes until the brie is fully melted and bubbling, and the mushrooms are tender when pierced with a knife. The edges of the brie should be lightly golden.
8. Remove from the oven, scatter with parsley if using, and serve warm.

Nutrition Per Serving (2 mushrooms)

Fasting Compatibility

Best suited to 16:8, 18:6, or OMAD eating windows as a snack or starter during the eating period. The combination of fat from brie and walnuts with the fibre from mushrooms produces a slow, sustained satiety with minimal insulin response — which is exactly what you want in a compressed eating window. These also work well as the last food before closing your eating window, as the fat slows digestion and keeps you comfortable through the overnight fast. Suitable for 5:2 protocols on feast days.

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• Cheese crisps with guacamole
• Prosciutto-wrapped mozzarella bites
• Bacon-wrapped asparagus spears

This recipe is for informational purposes only and is not medical advice. Always consult a qualified healthcare professional before making dietary changes, especially if you have an existing health condition.