Baked Bubble and Squeak: A Crispy British Classic

Baked bubble and squeak is a British dish of mashed potato and cooked cabbage, mixed with leftovers and baked until golden at the edges. This oven method gives you a crisp top with a soft centre, without standing over a frying pan; the vegetables and seasonings can vary with what you have.

Ingredients

2 tbsp unsalted butter, divided (30 g)
1 tbsp olive oil (15 ml)
1 medium yellow onion, finely chopped (about 150 g)
3 cups cold mashed potatoes (about 700 g)
2 cups cooked cabbage, finely chopped and well drained (about 200 g)
1 cup cooked Brussels sprouts or additional cabbage, chopped (about 150 g)
½ tsp fine salt (3 g), or to taste
¼ tsp freshly ground black pepper (about 0.5 g)
1 tsp English mustard (5 g), optional
1 tbsp chopped fresh parsley (about 4 g), optional

Instructions

Heat the oven to 400°F (200°C), or 180°C fan. Grease a 9-inch (23 cm) ovenproof dish with 1 teaspoon of the butter. Set out the cold mashed potatoes and cooked vegetables so they are ready to mix.
Warm the olive oil and 1 tablespoon (15 g) of the remaining butter in a frying pan over medium heat. Add the onion and cook for 6–8 minutes, stirring occasionally, until soft and lightly golden. Do not rush this step: raw, sharply flavoured onion can make the finished mixture taste harsh.
Put the mashed potatoes, cabbage and sprouts in a large bowl. Add the cooked onion, salt, pepper and mustard, if using. Mix until evenly combined, breaking up large clumps of vegetable but leaving some texture. Taste a small amount and adjust the seasoning; remember that leftover mash may already contain salt and butter.
Spoon the mixture into the greased dish and press it into an even layer. Rough up the surface with a fork to make ridges that can brown. Dot with the remaining 2 teaspoons (10 g) of butter.
Bake for 35–40 minutes, until piping hot throughout and browned at the edges. If the top is not as crisp as you like, place the dish under a hot grill for 2–3 minutes, watching closely so it does not burn. If checking the centre with a food thermometer, it should reach 165°F (74°C) for reheated leftovers.
Rest for 5 minutes, then scatter with parsley if desired and serve hot. The short rest helps the mixture hold together when spooned out.

Tips

Drain vegetables well. Wet cabbage or sprouts can make the centre loose and prevent browning. Press cooked vegetables in a sieve or blot them with a clean kitchen towel before chopping.
Use cold, fairly firm mash. Freshly made, loose mashed potatoes may need extra baking time and can turn the dish soft. If that is what you have, mix in 2–3 tablespoons (16–24 g) of plain flour or breadcrumbs to help absorb moisture; the texture will be a little denser.
Season after mixing. Leftover potatoes may already contain dairy and salt. Taste before adding more, and add mustard gradually if you want its sharpness.
Keep food safely. Refrigerate leftovers within 2 hours of baking. Store them covered in the fridge for 3–4 days, or freeze in portions for up to 2 months for best quality.

Serving Suggestions

Serve bubble and squeak as a hearty main with fried or poached eggs, baked beans, or a green salad. It also makes a useful side for roast meat, sausages or a simple piece of fish. For a traditional-style breakfast or brunch plate, pair it with eggs and tomatoes; keep any meat or eggs you add separate until they are cooked safely.

A spoonful of brown sauce or English mustard works well at the table, while a little chopped parsley adds freshness. Because the bake is rich and filling, a sharp pickle or lightly dressed salad is a good contrast.

Variations

Bubble and squeak is a flexible British way to use cooked vegetables, so there is no single fixed combination. Replace the sprouts with an equal amount of cooked kale, carrots, peas or other leftover vegetables. Chop firmer vegetables fairly small so they mix and heat evenly. If you have only cabbage, use 3 cups (about 300 g) in total.

For a cheesier top, sprinkle over ½ cup grated mature Cheddar (about 50 g) for the last 10 minutes of baking. To make the dish vegetarian, check that any added cheese is suitable for vegetarians. For extra savoury flavour, stir in ½ cup (75 g) of chopped cooked bacon or ham; these are optional and should be handled and stored as cooked leftovers.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours, covered, for up to 3–4 days. For longer storage, freeze portions in airtight containers for up to 2 months; thaw overnight in the refrigerator before reheating. Do not leave the bake at room temperature for more than 2 hours.

Reheat a portion in a covered ovenproof dish at 350°F (175°C) until hot throughout, usually 20–25 minutes from chilled; uncover for the last few minutes to restore some crispness. Microwave individual portions in short intervals, turning or stirring where practical. Reheated leftovers should reach 165°F (74°C), checked in the centre with a food thermometer. Reheat only the amount you plan to eat.

Frequently Asked Questions

Why is it called bubble and squeak?
The name is commonly associated with the bubbling and squeaking sounds made when the potato and vegetables cook in a pan. This baked version is quieter, but it keeps the familiar mix of potato and cooked vegetables.

Can I make baked bubble and squeak with fresh potatoes?
Yes. Boil peeled potatoes until tender, drain them very well, then mash and let them cool before mixing. The recipe calls for 3 cups (700 g) of mash, so start with roughly 800 g of raw potatoes; the final amount varies with the type of potato and how much water it absorbs.

Can I prepare it ahead?
You can assemble the mixture in the dish, cover and refrigerate it for up to 24 hours before baking. Bake it straight from the fridge, allowing about 5–10 extra minutes, and check that the centre is hot throughout. Refrigerate assembled food promptly rather than leaving it out.

How do I stop it going soggy?
Drain the cabbage and other vegetables thoroughly, and use firm, cold mashed potatoes rather than loose mash. Avoid adding extra liquid. A broad, shallow baking dish also helps the mixture brown instead of steaming.

Can I bake it without cabbage?
Yes. Use an equal quantity of cooked greens such as kale, or add more cooked sprouts and other vegetables. Cabbage gives the classic flavour, but the dish is designed to accommodate suitable leftovers.

Can I cook it in a smaller or larger dish?
A smaller dish makes a deeper bake that may need extra time, while a larger dish gives more browned surface and may cook faster. Keep the mixture in an even layer and check the centre for thorough heating before serving.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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