Mary Berry Parmentier Potatoes: Crispy & Foolproof Recipe

If you love the crispy edges of a roast potato but want something a little more elegant on the plate, Mary Berry parmentier potatoes are your answer. These neat, golden cubes are fluffy inside, crunchy outside, and perfumed with garlic and thyme. Mary Berry's version leans on a clever two-step method — parboil, then roast at high heat — so you get restaurant-quality results from a standard home oven. Total time is roughly 50 minutes, and one tray comfortably serves 4 to 6 people alongside a Sunday roast or a simple weeknight dinner.

Mary Berry Parmentier Potatoes: Recipe Overview, Prep & Cook Times, and Servings

What Are Parmentier Potatoes?

Parmentier potatoes are cubed potatoes roasted in fat with garlic and herbs. The name honors Antoine-Augustin Parmentier, the French pharmacist who championed the potato as food rather than animal feed in the 18th century. The dish itself is essentially a refined take on roast potatoes: uniform cubes instead of rough chunks, which means more surface area and more crisp edges per bite.

Why This Recipe Works

Mary Berry's approach solves the classic roast potato problem — soggy centers or burnt exteriors — with three moves:

• Parboiling for 5 to 7 minutes softens the interior without overcooking it.
• Drying and roughing up the cubes creates a starchy surface that crisps beautifully.
• High-heat roasting in preheated fat gives an immediate sizzle and even browning.

Prep Time, Cook Time, and Total Time

Stage	Time
Prep	15 minutes
Parboil	5–7 minutes
Roast	30–35 minutes
Total	About 50 minutes

Yield and Serving Suggestions

This recipe yields 4 to 6 side-dish servings. Pair the potatoes with roast chicken, beef, or lamb, or serve them alongside a lighter starter such as this Mary Berry Broccoli and Stilton Soup Recipe for a cozy cold-weather meal.

Ingredient Checklist for Mary Berry Parmentier Potatoes (Metric & Imperial)

Potatoes: The Star Ingredient

• 1 kg (2¼ lb) starchy potatoes — Russet, Maris Piper, or King Edward
• Cut into 2 cm (¾-inch) cubes for even cooking

Fat and Aromatics

• 4 tbsp (60 ml) olive oil or 3 tbsp (45 g) goose fat
• 3 garlic cloves, thinly sliced or lightly crushed
• 1 tbsp (15 g) unsalted butter (optional, for finishing)

Herbs and Seasonings

• 1 tsp (6 g) fine sea salt, plus more to taste
• ½ tsp (1 g) freshly ground black pepper
• 2 tsp (2 g) fresh thyme leaves, stripped from stems
• 1 tbsp (3 g) fresh flat-leaf parsley, chopped, for garnish

Optional Add-ins

• 1 tsp (2 g) smoked paprika for warmth
• 1 tbsp (10 g) grated Parmesan tossed in the final 5 minutes
• 1 sprig fresh rosemary, minced, in place of thyme

Ingredient	Metric	Imperial
Potatoes	1 kg	2¼ lb
Olive oil	60 ml	4 tbsp
Garlic	3 cloves	3 cloves
Fresh thyme	2 tsp	2 tsp
Sea salt	1 tsp	1 tsp

Essential Kitchen Equipment & Tools for Perfect Parmentier Potatoes

Must-Have Tools

• Large, heavy-bottomed roasting pan or sheet pan — even heat distribution is non-negotiable
• Sharp chef's knife — clean cuts mean uniform cubes and even cooking
• Large saucepan for parboiling
• Colander for draining and drying
• Kitchen towel or clean tea towel for patting potatoes dry

Nice-to-Have Tools

• Wire rack for cooling if you're roasting in batches
• Silicone spatula or metal turner for flipping without breaking cubes
• Garlic press if you prefer a finer garlic distribution

Equipment Notes

A dark, thin baking sheet will brown the bottoms of the potatoes too quickly. Choose a sturdy pan with a light or medium finish, and never crowd the potatoes — they need space to steam off moisture and crisp. If your pan is small, roast in two batches rather than piling cubes on top of each other.

Step-by-Step Cooking Method for Mary Berry Parmentier Potatoes

Step 1: Prepare the Potatoes

Peel the potatoes and cut them into even 2 cm (¾-inch) cubes. Rinse under cold water to remove surface starch, then drain.

Step 2: Parboil and Dry

1. Place the cubes in a large saucepan and cover with cold, salted water by about 2 cm (1 inch).
2. Bring to a boil and simmer for 5 to 7 minutes, until the edges are just tender but the centers still resist a knife.
3. Drain in a colander, then shake vigorously for 20 to 30 seconds. The cubes should look slightly roughened and floury on the outside.
4. Spread on a clean towel and pat completely dry. Any residual moisture will steam the potatoes instead of crisping them.

Step 3: Heat the Fat

Preheat the oven to 220°C (425°F). Add the olive oil or goose fat to your roasting pan and place it in the oven for 5 to 7 minutes, until the fat is shimmering and almost smoking.

Step 4: Roast to Golden Perfection

1. Carefully tip the dried potatoes into the hot fat. They should sizzle immediately.
2. Toss to coat every cube, then spread them in a single layer.
3. Season with salt and pepper.
4. Roast for 20 minutes without disturbing them.
5. Remove the pan, turn the cubes with a spatula, and roast for another 10 to 15 minutes, until deeply golden and crisp on all sides.

Step 5: Add Aromatics and Finish

In the final 5 minutes, scatter the sliced garlic and thyme over the potatoes. The garlic should turn fragrant and lightly golden — never brown, or it will taste bitter. If using butter or Parmesan, add it now and toss gently. Finish with chopped parsley and a final pinch of sea salt, then serve immediately.

Chef's Secret Tips for the Best Mary Berry Parmentier Potatoes

Tip 1: The Right Potato Matters

Waxy potatoes like red bliss hold their shape but stay dense inside. Starchy Russets and Maris Pipers break down slightly at the edges, creating the fluffy interior and craggy surface that crisps best.

Tip 2: Don't Skip the Shake

Shaking the drained potatoes in the colander scuffs their surfaces. Those tiny starch granules gelatinize in the oven and turn into the crunchy shell that makes parmentier potatoes so addictive.

Tip 3: Preheat Your Pan and Fat

Cold fat equals sticking and pale potatoes. A preheated pan guarantees an instant sizzle, which seals the surface and starts browning from the very first minute.

Tip 4: Season in Layers

Salt the boiling water, season the cubes before roasting, and finish with flaky salt at the end. Each stage builds depth rather than a single salty hit on the surface.

Tip 5: Rest Before Serving

Give the potatoes 2 to 3 minutes out of the oven before plating. The interiors finish setting, and the crust stays crisp rather than steaming under its own heat.

Ingredient Substitutions & Storage Advice for Parmentier Potatoes

Substitutions for Potatoes

• Yukon Golds — slightly creamier, still crisps well
• Sweet potatoes — reduce roasting time by 5 minutes; they brown faster
• Baby potatoes, halved — no peeling needed, but keep pieces uniform

Substitutions for Fat and Herbs

• Duck fat or butter in place of goose fat for a richer, nuttier flavor
• Dried thyme (1 tsp) if fresh isn't available — add it with the oil
• Rosemary or oregano for a Mediterranean twist

Storage and Reheating

Cool leftovers completely, then store in an airtight container in the refrigerator for up to 3 days. Reheat on a sheet pan at 200°C (400°F) for 8 to 10 minutes — never in the microwave, which turns them soggy.

Freezing Guidelines

Spread cooled roasted potatoes on a tray and freeze until solid, then transfer to a freezer bag for up to 3 months. Reheat from frozen at 220°C (425°F) for 15 to 18 minutes, turning once. They won't be quite as crisp as fresh, but they'll still beat any store-bought frozen roast potato.

Ready to elevate your roast dinner? Try this Mary Berry parmentier potatoes recipe tonight — and if you're building a full menu, a warming mary berry mushroom soup recipe makes a lovely first course. Share your golden results in the comments below!

Frequently Asked Questions

What are Mary Berry's Parmentier potatoes?

Mary Berry's Parmentier potatoes are cubed potatoes that are roasted until golden and crisp on the outside while staying fluffy inside. They are flavored with garlic and thyme, and the dish is essentially a refined, bite-sized version of classic roast potatoes. The name comes from the French Parmentier style, which refers to potato dishes, and Mary Berry's version is a simple, reliable recipe that fits alongside a Sunday roast or a weeknight meal.

How do you make Mary Berry's Parmentier potatoes crispy?

To get crispy edges, start by cutting the potatoes into even cubes, about 1 inch (2.5 cm) in size. Parboil them in salted water for 5–7 minutes until slightly tender, then drain well and let them steam dry. Toss the cubes with oil or melted fat, garlic, and thyme, and spread them in a single layer on a preheated baking tray. Roast at 200°C (400°F) for 30–40 minutes, turning once or twice, until golden and crisp. Hot fat and a single layer are key to crispiness.

Can I prepare Mary Berry's Parmentier potatoes ahead of time?

Yes, you can prepare them ahead. Parboil and drain the potatoes, then toss with oil, garlic, and thyme. Spread them on a baking tray and refrigerate for up to 24 hours. When ready to cook, roast them directly from the fridge, adding a few extra minutes to the cooking time. Alternatively, you can roast them fully, cool, and reheat in a hot oven for 10–15 minutes until crisp again.

What potatoes are best for Parmentier potatoes?

Floury or all-purpose potatoes work best because they become fluffy inside and crisp outside. In the US, Russet or Yukon Gold potatoes are excellent choices. Russets give a lighter, fluffier interior, while Yukon Golds hold their shape well and have a buttery flavor. Avoid waxy potatoes like red potatoes, as they tend to stay firm and won't crisp up as nicely.

What can I serve with Mary Berry's Parmentier potatoes?

These potatoes are versatile and pair well with roast chicken, beef, lamb, or pork. They also work alongside fish, such as roasted salmon, or as part of a vegetarian meal with a hearty salad or veggie roast. For a classic Sunday roast, serve them with gravy, Yorkshire pudding, and seasonal vegetables. They are also great with a simple weeknight dinner like grilled steak or sausages.

Are Mary Berry's Parmentier potatoes healthy?

Parmentier potatoes are roasted, not deep-fried, so they contain less oil than many potato sides. However, they are still a carbohydrate-rich dish with added fat, so they are best enjoyed in moderation as part of a balanced meal. Using olive oil and leaving the skins on can add fiber and nutrients. For a lighter version, use less oil and skip the garlic butter finish.