By Bill Ohaire | Published: April 2026 | Last Updated: April 2026
Quick Answer
4cm Lamb Chop: Grill at 220-260°C (425-500°F) for 6-7 min/side per side (medium).
4cm Lamb Chop Cook Times
Double-cut lamb chops — a premium restaurant cut. Sear first over direct heat, then finish on indirect for the most even cook.
| Doneness | Time Per Side |
| Rare | 4-5 min/side |
| Medium-Rare | 5-6 min/side |
| Medium | 6-7 min/side |
| Medium-Well | 7-8 min/side |
Grill temperature: 220-260°C (425-500°F)
Why Thickness Matters More Than Weight
Thickness is the single most important factor in determining cook time on the BBQ. A flat 300g steak that's 1cm thick cooks in 4 minutes total. A 300g steak that's 4cm thick needs 12+ minutes. Same weight, completely different cook times.
Heat travels from the surface inward. The thicker the cut, the longer it takes for the centre to reach your target temperature. This is why a meat thermometer is essential — time is just a guide.
Tips for 4cm Lamb Chop
- Measure accurately — use a ruler if you're not sure. Even 0.5cm difference changes the cook time significantly.
- Use a thermometer — the times above are guides. Your specific cut, starting temperature, and BBQ setup all affect the actual time.
- Don't press down — pressing with a spatula squeezes out juices and doesn't speed up cooking.
- Flip once — one flip is all you need. Let the Maillard reaction do its work undisturbed.
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Frequently Asked Questions
How long to cook a 4cm lamb chop?
A 4cm thick lamb chop takes approximately 4-5 min/side per side for rare at 220-260°C (425-500°F). Always use a meat thermometer to confirm doneness.
What temperature should I grill a 4cm lamb chop?
Grill a 4cm lamb chop at 220-260°C (425-500°F). Double-cut lamb chops — a premium restaurant cut.
Does thickness affect cook time more than weight?
Yes. Thickness is the primary factor in determining cook time on the BBQ. Heat travels from the surface inward, so a thicker cut takes proportionally longer to cook through regardless of its total weight.
Should I use direct or indirect heat for 4cm lamb chop?
For 4cm thick cuts, use a combination: sear over direct heat for 2-3 minutes per side, then finish over indirect heat until the internal temperature reaches your target.
Related BBQ Guides
Sources & References
2
Weber Grill Skills
Weber Australia's guides for grilling lamb on gas and charcoal.
Manufacturer
4
AmazingRibs.com
Science-based lamb grilling guides and internal temperature charts.
Reference