Looking for authentic easy Finnish recipes at home? The Mushroom-omelette roll (Sienimunakas-kääryle) is a timeless Nordic favorite that turns simple pantry staples into an elegant, savory delight. Whether served as a cozy weekday lunch, a side dish, or a party appetizer, this baked omelette roll packed with earthy sautéed mushrooms is as versatile as it is comforting.

Recipe Overview

Key Details Information
Prep Time 15 minutes
Cook Time 25 minutes
Servings 4–6 portions
Difficulty Level Easy

Ingredients

For the Omelette Sheet:

  • 6 large eggs

  • 5 dl (approx. 2 cups) milk

  • 1 dl (approx. ½ cup) wheat flour

  • 1 tsp salt

  • ½ tsp ground white pepper

For the Mushroom Filling:

  • 1 liter fresh wild mushrooms (Chanterelles, hedgehog mushrooms, or ceps/porcini — cremini or button mushrooms work great too)

  • 2 to 3 medium onions, finely chopped

  • 3 tbsp butter or cooking oil

  • Salt and freshly ground black pepper to taste

  • Fresh thyme or basil (optional)

  • 2–3 tbsp heavy cream or crème fraîche (optional, for a creamier texture)

  • Grated cheese (optional, for topping before reheating)

Chef’s Pro Tips & Substitutions

  • Mushroom Selection: For true Finnish flavors, wild chanterelles or porcini mushrooms are king. If wild mushrooms aren’t accessible, cremini or brown button mushrooms provide a rich flavor.

  • Flour Whisking Technique: Always whisk the flour into a small portion of the milk first to create a smooth paste before adding the remaining liquids. This prevents flour lumps in your baked omelette base.

  • Easy Unmolding: Once the baked sheet comes out of the oven, invert it onto a clean piece of parchment paper sprinkled lightly with breadcrumbs or extra cheese so it doesn’t stick while rolling.

  • Gluten-Free Swap: Replace the wheat flour with a 1:1 gluten-free flour blend or cornstarch without losing structural integrity.

Step-by-Step Instructions

1. Prepare and Bake the Omelette Base

  1. Preheat your oven to 200°C (400°F). Line a large, high-edged baking sheet or jelly roll pan with parchment paper.

  2. In a large bowl, whisk together the flour and milk until smooth.

  3. Beat in the 6 eggs, then season with salt and white pepper.

  4. Pour the egg batter evenly onto the prepared baking sheet.

  5. Bake in the middle rack for about 15 to 20 minutes, or until set and lightly golden on top.

2. Prepare the Mushroom Filling

  1. Clean and chop the mushrooms into bite-sized pieces.

  2. Heat butter in a skillet over medium-high heat. Add the chopped mushrooms and cook until their natural liquid releases and completely evaporates.

  3. Add the chopped onions and sauté until soft and translucent.

  4. Season with salt, black pepper, and herbs (thyme or basil).

  5. (Optional) Stir in a couple of tablespoons of heavy cream or crème fraîche for a velvety finish, letting it reduce slightly.

3. Assemble and Roll

  1. Invert the warm baked omelette sheet onto a fresh piece of parchment paper. Peel off the original backing paper carefully.

  2. Spread the mushroom mixture evenly over the baked omelette surface, leaving a small border at the edges.

  3. Starting from the short side, gently but tightly roll the omelette sheet into a log shape using the parchment paper to assist you.

4. Heat and Serve

  1. Transfer the roll seam-side down onto a baking tray or ovenproof serving dish.

  2. (Optional) Sprinkle a handful of grated cheese on top and return to the oven at 200°C (400°F) for 5 minutes until melted and bubbly.

  3. Slice into thick rounds and serve warm alongside a fresh green salad.

Watch the Video Instructions

Prefer visual guidance? Check out the embedded YouTube video below to watch every step of crafting this delicious Mushroom-omelette roll (Sienimunakas-kääryle) in real time: