How to Grill Butterflied Leg of Lamb
Lamb · Grilling · Updated 2026-08-11
Grill over two zones to an even medium-rare, then slice across the grain.
🌡️ 400°F grill🥩 135°F internal⏱️ Rest 10 min
Quick answer: Grill butterflied leg of lamb at 400°F for about 8 minutes per side, pulling at 135°F internal, then rest 10 min.
How long to grill Butterflied Leg of Lamb
Grill at 400°F for about 8 minutes per side (at 2" thick), to an internal temp of 135°F. Rest 10 min.
| Doneness | Internal temp | Time per side |
|---|---|---|
| Rare | 125°F | 5.8 min/side |
| Medium-rare | 135°F | 6.8 min/side |
| Medium | 145°F | 8.0 min/side |
| Medium-well | 150°F | 9.2 min/side |
| Well-done | 160°F | 10.6 min/side |
Thicker cuts need longer; use the calculator to adjust for thickness.
Calculate exact time → Temperature chart
Frequently asked questions
How long to grill butterflied leg of lamb?
Grill butterflied leg of lamb about 8 minutes per side at 400°F, until it reaches 135°F internal.
What temperature to grill butterflied leg of lamb?
Set up the grill for about 400°F at the grate.
What internal temp for butterflied leg of lamb?
Cook butterflied leg of lamb to 135°F internal for medium-rare; see the doneness chart for other levels.