Miso Mashed Potato Stuffed Mushrooms — Savory Party Bites

This stuffed mushroom recipe has two components: balsamic-roasted mushroom caps and creamy miso mashed potatoes. Together they make an elegant, crowd-pleasing appetizer for special gatherings.

Both elements can be prepared ahead of time. Rewarm, assemble, and serve when guests arrive.

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Stuffed mushrooms are one of my favorite appetizers: compact, easy to eat, and endlessly adaptable. This version pairs the deep, tangy flavor of balsamic-roasted mushrooms with rich miso mashed potatoes for a savory bite that’s both comforting and refined.

The recipe breaks into two simple parts — mushrooms and miso mashed potatoes — which makes it easy to prep ahead and finish just before serving.

👩‍🍳 Tips on Roasting Mushrooms

• Remove stems and gently scrape the dark gills from the cap cavity to reduce excess moisture and create room for filling.
• Wipe mushrooms clean with a paper towel rather than rinsing to avoid soaking them.
• Roast slowly (about 30 minutes) to concentrate mushroom flavor and allow the balsamic to caramelize slightly.

👩‍🍳 Tips on Making Miso Mashed Potatoes

• Boil potatoes in their skins to avoid excess water absorption and to preserve texture.
• A potato ricer gives the smoothest, lump-free texture; if mashing by hand, peel first and work while warm.
• Choose firmer russets if you want the mash to hold its shape inside caps; Yukon Golds make a silkier mash.

5 from 5 votes

Miso Mashed Potato Stuffed Mushrooms

Balsamic-roasted mushrooms filled with savory miso mashed potatoes and finished with fresh chives — a flavorful, elegant appetizer.

Prep Time20 mins

Cook Time30 mins

Total Time50 mins

Course: Appetizer

Cuisine: American

Keyword: Miso mashed potatoes, Roasted mushrooms

Servings: 30 appetizers

Calories: 43.5kcal

Author: Susan Pridmore

Equipment

• Baking sheet
• Parchment paper
• Paring knife
• Whisk
• Large bowl
• Dutch oven or heavy-bottomed pot
• Potato ricer (optional)
• Chef’s knife

Ingredients

Balsamic Mushrooms

• 30 white button mushrooms (Cremini or Baby Bella)
• 3 tablespoons balsamic vinegar
• 2 tablespoons extra-virgin olive oil
• ⅛ teaspoon kosher salt
• ⅛ teaspoon ground black pepper

Miso Mashed Potatoes

• 2 large russet potatoes ideally Idaho-grown
• 1 tablespoon unsalted butter
• 3 tablespoons white miso paste
• ⅓ cup finely chopped shallot
• 2 tablespoons half & half
• ½ teaspoon kosher salt
• ½ teaspoon ground black pepper
• 2 tablespoons thinly sliced chives

Instructions

Balsamic Mushrooms

• Preheat the oven to 375°F and line a baking sheet with foil or parchment.
• Remove stems by twisting or cutting with a paring knife and reserve for another use. Gently scrape the dark gills from the inside of each cap to reduce moisture. Wipe each mushroom clean with a towel.
• Whisk together balsamic vinegar, olive oil, salt, and pepper in a large bowl. Toss mushrooms until evenly coated, place upright on the prepared sheet, and roast for 30 minutes, turning them over halfway through.

Miso Mashed Potatoes

• Place potatoes in a pot, cover with well-salted water, and simmer 20–25 minutes until tender. Drain, peel if desired, and halve.
• Rice or mash the potatoes while warm. Add butter and white miso, mashing until smooth. Stir in chopped shallot, half-and-half, salt, and pepper to taste.

Assembly

• Spoon about 1 tablespoon (or an amount that fits your caps) of miso mashed potatoes into each roasted mushroom. Keep assembled mushrooms warm in a low oven or warming drawer until serving.
• Garnish with thinly sliced chives just before serving.

Nutrition

Calories: 43.5kcal
| Carbohydrates: 6.3 g
| Protein: 1.5 g