Roasted Bone Marrow (Salt + 20 Minutes)
By Hannah Lee · Nose-to-Tail Cook · Updated 2026-05-08
Beef marrow bones split lengthwise, roasted at 450°F for 18-22 minutes. Salt only. The cleanest carnivore fat source — 850 calories per 100g of pure animal fat.
Carnivore roasted bone marrow is split-lengthwise beef marrow bones (about 6 inches long, sold as canoe-cut at most butchers) sprinkled with coarse salt and roasted at 450°F for 18 to 22 minutes until the marrow is bubbling and golden but not yet liquefied past the edges. Salt is the only seasoning. A 2-bone serving (about 4 ounces of scooped marrow) delivers 8g protein, 38g fat, and 360 calories — almost pure animal fat at 850 calories per 100g, similar to butter or tallow but with the trace minerals of the marrow tissue. Marrow bones cost $4 to $7 per pound at most butchers; ask for canoe-cut to save the splitting work. Eat with a small spoon directly from the bone or spread on slices of cooked steak as a self-basting fat. Pull at 18 minutes for firmer marrow, 22 minutes for spreadable. Past 25 minutes the marrow renders out completely and you're left with empty bones.
Ingredients
| Ingredient | Protein | Fat | Calories |
|---|---|---|---|
| 2 marrow bones, marrow scooped (per serving) | 8g | 38g | 360 |
| Coarse salt (per serving) | 0g | 0g | 0 |
| Per serving | 8g | 38g | 360 |
Macros per serving (after cooking and any fat draining). Source: USDA FoodData Central.
Instructions
- 1
Preheat oven to 450°F. Place a wire rack inside a sheet pan.
- 2
Pat marrow bones dry with paper towels. Place cut-side up on the wire rack.
- 3
Sprinkle 1 tsp coarse salt evenly across the exposed marrow surfaces.
- 4
Roast at 450°F for 18 to 22 minutes until marrow is bubbling, lightly browned on top, and pulls slightly away from the bone edges.
- 5
Pull at 18 minutes for firmer texture (better for spreading); pull at 22 minutes for fully soft, spoonable marrow.
- 6
Rest 3 minutes — the marrow continues to set as it cools slightly.
- 7
Serve with small spoons directly in the bones, or scoop the marrow onto cooked beef as a fat-rich topping.
- 8
Save the empty bones for a 24-hour bone broth — they still have flavor in the connective tissue.
Nutrition per Serving
Frequently Asked Questions
Canoe-cut vs cross-cut bones?
Canoe-cut means split lengthwise into a long trough shape — exposes more surface area for crisping and easier scooping. Cross-cut bones are sliced perpendicular into 2-inch rounds, the standard for braising and broth. For roasted marrow, canoe-cut is the better presentation. Most butchers can split bones to canoe-cut on request with one day's notice; the cut takes 30 seconds with a band saw.
How is marrow nutritionally different from butter or tallow?
All three are roughly 80 to 90% fat with trace protein, but marrow contains more conjugated linoleic acid (CLA) and a higher proportion of saturated fat than tallow. Marrow also carries small amounts of B12, iron, and zinc from the bone tissue itself. For carnivore eaters, marrow is among the richest single-source fat options — eat with the bone for the texture and flavor depth that bottled tallow can't match.
Why roast at 450°F instead of lower?
Lower temperatures (350°F) take 35 to 40 minutes to set the marrow and the surface stays pale instead of browning. Higher temperatures (500°F+) brown the surface in 10 minutes but the interior renders out before it sets, leaving you with an empty trough of fat. 450°F for 20 minutes is the window where the surface caramelizes lightly and the interior reaches spoonable texture without rendering away.
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