Oven topside is the classic British Sunday roast joint — a proper crust, pink or well-done slices to taste, and leftovers that make the week's best sandwiches. Topside Joint 1kg is the weeknight-sized roast; Sirloin Joint 1kg is the sirloin joint when you want a richer carve. Shop both in topside and beef.
Oven method
Take the joint out of the fridge 30 to 45 minutes before roasting. Pat dry, rub with oil, salt, pepper, and a little mustard powder or garlic if you like. Preheat the oven to 220°C (fan 200°C). Sit the joint on a rack or bed of onions in a roasting tin and blast 15 minutes to set the crust, then drop to 180°C (fan 160°C). As a guide for a 1kg topside: rare about 40 to 50 minutes total after the blast, medium 55 to 70 minutes, well-done 75 to 90 minutes — always probe the centre (around 52°C rare, 60°C medium, 70°C well-done) and pull a few degrees early. Rest 15 to 20 minutes under loose foil before carving so the juices stay in the slice. Slice thinly against the grain. Do not skip the rest; carving straight from the oven empties the board. Baste once or twice with tin juices if the surface looks dry.
Slow cooker and leftover backup
No long oven sit: slow cooker on low 6 to 8 hours with stock and onions, then a hot oven blast for crust if you want bark. Browse topside for topside packs, and beef for sirloin joints, steaks and mince beside.
What to serve
Yorkshire puddings, roast potatoes, greens, and proper gravy. Leftover topside is excellent cold with horseradish, or gently reheated in gravy for midweek plates. Freeze leftover slices flat; thaw in the fridge overnight.
Times above are a guide for home ovens, air fryers and pans — always trust a probe over the clock, and rest meat before you carve so the juices stay in the slice, not on the board. British packs vary a little in thickness, so start checking a few minutes early the first time you cook a new size.
Write your own fridge note the first time you cook a new pack size — home ovens and pans vary, and a two-minute early check beats dry meat. Rest on a warm plate, not a cold board, so the juices stay put when you carve or plate up.
Topside, sirloin and brisket are all on our beef joints page.