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How Long to Smoke an 8 lb Brisket — Cook Time Calculator

An 8-pound brisket is ideal for a smaller gathering of 6–8 people and fits in most home smokers without issue. At 225°F, plan on 12–14 hours — a same-day early-morning start for an evening dinner, or an overnight cook for a lunchtime serve. Use the calculator below to reverse-engineer your start time from your target dinner hour.

Pre-filled for 8 lbs. An 8-pound brisket is often a flat-only cut — it can cook faster than a full packer of the same weight due to less thickness.
lbs

Whole packer brisket (flat + point)

The Stall: Brisket typically hits a "stall" at 155–170°F where internal temperature stops rising for 2–6 hours. This is normal — evaporative cooling is happening. Wrapping in butcher paper or foil (the "Texas Crutch") pushes through it.

Frequently Asked Questions

How long to smoke a brisket per pound?
At 225°F, expect 1.5–2 hours per pound. At 250°F, plan for 1–1.5 hours per pound. At 275°F, roughly 45–60 minutes per pound. Always cook by internal temperature (195–205°F), not by time alone.
When should I wrap brisket?
Wrap in butcher paper or aluminum foil when the brisket reaches 160–170°F internal temperature — usually after about 50–60% of the estimated cook time. This powers through the stall and speeds up the remaining cook.
What internal temperature is brisket done?
Brisket is technically food-safe at 160°F, but it's not tender until 195–205°F when the collagen fully breaks down. The 'probe test' — sliding a thermometer probe in with zero resistance, like butter — is the most reliable doneness indicator.
How long to rest a brisket after smoking?
Rest brisket for at least 1 hour, ideally 2–4 hours. Wrap in butcher paper, then a towel, and place in a cooler. This lets juices redistribute and continues gentle rendering of fat.

Frequently Asked Questions

How long to smoke an 8 lb brisket at 225°F?
At 225°F, an 8-pound brisket typically takes 12–14 hours. An 8-pound flat tends to cook faster than a full packer brisket of the same weight because it's thinner. Always verify with a probe test at 195–205°F internal temperature.
Is an 8 lb brisket enough for a party?
An 8-pound raw brisket yields about 5–5.5 pounds cooked (35% shrinkage). At 6 oz per serving, that feeds 13–14 people. For sandwiches (4 oz), it feeds 20. It's a solid amount for a small gathering of 8–12 guests with sides.
What's the difference between an 8 lb flat and an 8 lb full packer?
An 8-pound flat is the leaner, thinner section — it cooks more evenly but can dry out if taken past 200°F. An 8-pound full packer still has both flat and point, so it's smaller overall but has more fat marbling. Full packers are more forgiving for beginners.

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