Cauliflower Steaks with Mushroom Gravy: A Vegan Thanksgiving Main

If you are cooking for vegetarian or vegan guests this Thanksgiving, a side dish piled high on a plate rarely feels like a proper main. Cauliflower steaks fix that: thick slabs of cauliflower roasted until deeply golden at the edges and tender in the middle, served under a glossy mushroom gravy. They look impressive, cost very little, and everything except the final roast can be done a day ahead.

Why this works as a holiday main

Cauliflower has a mild, slightly nutty flavour that browns beautifully. Cut into thick slices, it gets the same caramelised crust you would want from roasted meat, while the soft centre soaks up the gravy. The gravy is built on browned mushrooms, onion, garlic, thyme and a splash of soy sauce for savoury depth, so even guests who love a traditional turkey dinner will happily pour it over everything else on their plate.

How to cut the steaks

Choose large, compact heads with tight florets. Trim the leaves, leave the core intact, and stand the head upright. Slice straight down through the centre into slabs about 1 inch (2.5 cm) thick. You will usually get two or three whole steaks from the middle of each head; the loose florets that fall away are not wasted. Roast them on the same tray as little bonus bites, or save them for soup or a cauliflower mash.

Tips for the best texture

• Use a hot oven and a large pan. Crowding steams the cauliflower instead of browning it. Use two trays if needed.
• Do not skip the flip. Turning halfway gives you colour on both sides.
• Brown the mushrooms properly. Let them sit undisturbed for a few minutes before stirring. That is where the gravy gets its flavour.
• Thicken gradually. Whisk the flour in well, then add the broth in a slow stream so the gravy stays smooth.
• Season at the end. Soy sauce and broth are already salty, so taste before adding more salt.

Variations

• Spiced: rub the steaks with smoked paprika and a little cumin before roasting.
• Lemony and fresh: finish with lemon zest, parsley and toasted walnuts.
• Gluten-free: use tamari and swap the flour for cornstarch (use 1 tablespoon mixed with cold water).
• Not vegan? Finish the gravy with a spoonful of butter for extra gloss.

Serving ideas for Thanksgiving

Pair the steaks with creamy mashed potatoes, maple roasted carrots, a cranberry sauce and a simple green salad. Because the gravy is vegetable-based, it can also be shared at the table for everyone, so nobody needs a separate pot. For a more relaxed day, roast the steaks while the turkey rests, since both want a hot oven and the cauliflower needs only 25 minutes.

Make ahead and storage

Make the gravy up to three days ahead and keep it covered in the fridge; reheat gently with a splash of broth. Cut the cauliflower the day before and store the slabs in a container lined with paper towels. Leftover steaks keep for 3 days in the fridge and reheat well in a 400°F (200°C) oven for 10 minutes, which brings back the crisp edges. The gravy also freezes for up to 2 months.

Note: if you have a soy or wheat allergy, check the label of your soy sauce, or use a certified allergen-free alternative.