Root Vegetable and Mushroom Pie with Rosemary Biscuit Topping
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 16 Jan 2026
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This hearty root vegetable and mushroom pie is the ultimate cold-weather comfort food. Featuring a nutrient-rich blend of celeriac, parsnips, swede and earthy porcini mushrooms, the filling is simmered in a silky, sherry-infused sauce. Unlike a traditional pastry-topped dish, this recipe uses a rosemary-flecked biscuit topping that soaks up the savoury juices while remaining light and fluffy on the inside.
As a substantial vegetarian main course, this dish is perfect for family gatherings or a meat-free Sunday lunch. The root vegetable base can be prepared up to two days in advance, making it a stress-free option for entertaining. Serve it alongside some steamed seasonal greens or a crisp side salad for a beautifully balanced, homemade meal that highlights the best of British winter produce.
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Ingredients for Root Vegetable and Mushroom Pie with Rosemary Biscuit Topping
1450ml water
2 tablespoons vegetarian bouillon base
2 very large carrots, peeled, quartered lengthwise, cut crosswise into 1/2-inch pieces
1 large celery root (celeriac), peeled, cut into 1/2-inch pieces
2 large parsnips, peeled, quartered lengthwise, cut crosswise into 1/2-inch pieces
1 large rutabaga, peeled, cut into 1/2-inch cubes
1 turnip, peeled, cut into 1/2-inch cubes
30g dried porcini mushrooms,* broken into 1/2-inch pieces, rinsed
3 tablespoons butter
675g chopped onions
4 large garlic cloves, chopped
1/2 teaspoons minced fresh rosemary
120ml plain flour
60ml double cream
2 tablespoons imported dry Sherry
1/4 cup chopped fresh Italian parsley
2 1/4 cups unbleached plain flour
1 tablespoon baking powder
2 teaspoons minced fresh rosemary
1 teaspoon salt
6 tablespoons (3/4 stick) chilled unsalted butter, diced
325ml (or more) chilled buttermilk
How to make Root Vegetable and Mushroom Pie with Rosemary Biscuit Topping
Bring 1450ml water and bouillon base to boil in large pot over medium-high heat, stirring to dissolve bouillon. Add carrots and next 5 ingredients. Simmer until vegetables are tender, about 7 minutes. Drain; reserve vegetables and broth.
Melt butter in same pot over medium heat. Add onions; sauté until beginning to brown, about 10 minutes. Mix in garlic and rosemary; stir 2 minutes. Add flour; stir 1 minute. Gradually whisk in reserved broth, then cream and Sherry. Cook until sauce is thick and reduced to 950ml , whisking often, about 8 minutes. Mix in reserved vegetables and parsley. Season with salt and pepper. Transfer filling to buttered 13x9x2-inch baking dish. DO AHEAD: Can be made 2 days ahead. Cover with foil; chill.
Preheat oven to 204°C. Bake filling, covered, until bubbling, about 50 minutes. Meanwhile, prepare biscuits.
Stir first 4 ingredients in large bowl to blend. Add butter. Using fingertips, rub in butter until mixture resembles coarse meal. Gradually add 325ml buttermilk, tossing with fork until dough is evenly moistened and adding more buttermilk by tablespoonfuls if dry.
Drop biscuit dough atop hot filling by heaping tablespoonfuls; sprinkle with pepper. Bake uncovered until tester inserted into centre of biscuits comes out clean, about 45 minutes. Cool 15 minutes.
Available in the produce section of many supermarkets and at specialty foods stores and Italian markets.
Disclaimer
While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.
Article history
The information on this page is peer reviewed by qualified clinicians.
16 Jan 2026 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

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