The Black Onyx Angus Rump MB3–4+ delivers bold, beef-forward flavour with a refined edge. Sourced from Stanbroke, formerly Rangers Valley, one of Australia’s most respected beef producers, this premium rump offers balanced marbling, a satisfying chew, and a clean, confident finish that serious steak lovers appreciate.
Raised with precision and finished through an extended grain-feeding program, this cut reflects genuine craftsmanship at every stage. It is not an ordinary rump. It is finely marbled, expertly aged, and produced under the verified Black Onyx program to ensure consistency and eating quality.
Butcher’s Notes
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Cut Weight: Approx. 8 to 9kg whole piece
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Breed: 100% Black Angus (Verified Black Onyx Program)
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Marble Score: MB3–4+
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MSA Graded: Yes
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Feeding: Long-fed grain, minimum 250 days
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Ageing: 21 days
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Processing: Hand-trimmed, full cap on
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Packaging: Vacuum-sealed, freezer-safe
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Shelf Life: Up to 10 weeks refrigerated
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Delivery: Chilled with option for frozen dispatch
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Cooking Methods: BBQ, pan-searing, roasting, slicing into rump steaks
Rangers Valley Black Onyx Angus: What Sets It Apart
Black Onyx Angus from Rangers Valley is recognised globally for quality, consistency, and marbling performance.
The program begins with purebred Angus cattle selected specifically for marbling and reliability. A long and carefully controlled grain-feeding protocol develops flavour and texture without the use of hormone growth promotants.
Raised in northern New South Wales, Black Onyx cattle are managed under a program known for producing some of the world’s most marbled Angus beef. Each cut is professionally graded, aged, and trimmed to deliver dependable results every time.
Black Onyx beef appears on menus worldwide, trusted by chefs for its clean finish, tenderness, and depth of flavour.
Why the Rump Deserves More Respect
The rump is often underestimated, yet it delivers powerful flavour and impressive versatility when handled correctly.
Cut from the hindquarter, it is naturally leaner while remaining robust and full of character. Its firm structure makes it ideal for grilling, roasting, or slicing, and its balanced marbling ensures juiciness without excess fat.
With MB3–4+ marbling and professional trimming, this Black Onyx rump delivers steakhouse-quality results at home for those who appreciate bold, savoury beef.
MB3–4+: Balanced Marbling, Elevated Flavour
Marbling score MB3–4+ represents a medium level of intramuscular fat that enhances flavour and mouthfeel without overwhelming the natural meatiness of the cut.
This level of marbling provides a moist, buttery texture while preserving a clean, beef-forward profile. It is a sweet spot for steak lovers who want richness with restraint.
When combined with proper ageing and skilled trimming, MB3–4+ ensures consistent cooking performance and a reliable finish across grilling, pan-searing, or sous vide methods.
Best Ways to Cook It Right
Rump steak rewards the right technique. Follow these simple steps to turn this underrated cut into a show-stopping meal:
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Bring to Room Temperature: Take the rump out of the fridge at least 30 minutes before cooking. This ensures even heat distribution for a consistently cooked meal.
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Pat Dry and Season Well: Use paper towels to dry the surface, then season generously with sea salt. Dry meat sears better, giving you a rich crust.
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Use a Hot Pan or Grill: Preheat your skillet or grill until it is smoking hot. High heat locks in juices and develops flavour through the Maillard reaction.
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Sear First, Then Cook to Temp: Sear each side for 2 to 3 minutes, then lower the heat or move to indirect heat. Aim for medium rare for the best tenderness.
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Rest Before Slicing: Let the meat rest for 5-10 minutes after cooking. This allows the juices to redistribute, keeping the meat moist.
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Slice Against the Grain: Always cut across the muscle fibres. This shortens the grain, giving you a more tender bite every time.
Flavour Profile: Earthy, Bold, and Clean
The Black Onyx Angus Rump delivers an assertive yet refined flavour. It opens with clean, earthy aromas, followed by savoury depth and subtle caramel notes from the marbling.
The texture is juicy without being greasy, and the finish is dry and lingering. This is a steak built for those who enjoy balance, structure, and real beef character.
Packaging, Handling, and Delivery Assurance
Each order includes a whole Black Onyx rump, vacuum-sealed to protect freshness and quality.
Cuts are packaged to meet strict HACCP food safety standards and include clear labelling with marble score, weight, use-by date, and region of origin. Packaging is freezer-safe, allowing for flexible storage without compromising texture.
Orders are shipped Australia-wide using temperature-controlled insulation, with chilled delivery as standard and frozen dispatch available on request.
Best Uses and Cooking Occasions for Black Onyx Angus Rump
This cut is perfect for hearty meals and crowd-pleasing dishes. Use it for:
- Midweek steak nights with minimal prep.
- Backyard barbecues with bold sides.
- Sliced steak salads or protein-packed wraps.
- Stir-fries, fajitas, or beef skewers.
- Whole roast carving for family-style dinners.
Sauces and Sides: Pair with peppercorn sauce, chimichurri, or garlic herb butter. Serve with roasted root vegetables, crispy potatoes, or charred greens.
Drinks: Medium-bodied reds such as Tempranillo, Grenache, or Malbec enhance the rump’s flavour beautifully.
Why Buy Black Onyx Angus from Carnivore Society?
Carnivore Society partners with producers who meet strict standards for quality, transparency, and ethical production.
Through our relationship with Rangers Valley, we offer Black Onyx Angus cuts that are typically reserved for fine-dining restaurants and export markets. This MB3–4+ rump is rarely available to the public.
When you shop with Carnivore Society, you receive verified marbling, professional handling, fast chilled delivery, and access to cuts you will not find in supermarkets.
A Rump Built for Real Steak Lovers
The Black Onyx Angus Rump MB3–4+ delivers bold flavour, balanced richness, and dependable performance. It is a cut that respects tradition while offering premium refinement.
Order today and experience the depth, structure, and craftsmanship that define Black Onyx Angus beef.
