How Long to Cook Brisket in an Electric Smoker by Weight

Brisket in an electric smoker is a seasoned beef brisket cooked low and slow over wood smoke, then rested and sliced across the grain. At 225°F (107°C), plan on roughly 1 to 1½ hours per pound, but use tenderness—not the clock alone—to decide when it is ready.

Ingredients

1 beef brisket flat, about 5 lb (2.3 kg), trimmed of excess hard fat
1 tbsp (15 g) kosher salt
2 tbsp (14 g) coarsely ground black pepper
1 tbsp (9 g) garlic powder
1 tsp (2 g) smoked paprika, optional
1 tbsp (15 ml) Worcestershire sauce, as a binder
2 cups (475 ml) water for the smoker’s water pan
About 2 cups (roughly 120 g; weight varies by wood) dry wood chips, such as oak, hickory, or pecan; use the amount and type recommended for your smoker

Instructions

Trim and season the brisket. Pat the brisket dry. Trim away loose flaps and any very hard surface fat, leaving an even layer about ¼ inch (6 mm) thick where possible. The flat is relatively lean, so avoid trimming it bare. Stir the salt, pepper, garlic powder, and optional paprika together. Brush the Worcestershire sauce over the meat in a thin layer, then press the seasoning onto all sides. Allow about 10 minutes to trim and 5 minutes to season. If you prefer to season ahead, refrigerate it uncovered for up to 12 hours, then add that extra waiting time to your schedule.
Set up the electric smoker. Preheat the smoker to 225°F (107°C), following the manufacturer’s instructions for adding wood chips. Put the water in the water pan and arrange the rack so air can circulate around the meat. Allow about 10 minutes of active setup; preheating time varies by appliance and is not included in the recipe’s 8-hour cooking estimate. Keep the smoker outdoors in a ventilated location, away from walls and overhangs. Avoid filling the chip tray beyond its recommended level.
Smoke the brisket. Place the brisket on the rack with the fat cap facing the smoker’s heat source; in many upright electric smokers, that means fat-side down. Close the door and smoke at a steady 225°F. Add chips only as directed by your model, especially during the early part of the cook, when smoke has the most impact on flavor. Resist checking frequently: opening the door lets heat escape and can extend the cook. For a 5 lb (2.3 kg) flat, use about 8 hours as a planning estimate, not a deadline. A thinner brisket may finish sooner, while a thick one or a smoker that runs cool may take longer.
Check the temperature and wrap if you like. After roughly 4 hours, check the thickest part of the flat with a clean instant-read or leave-in thermometer, keeping the probe away from the rack. The temperature may pause around 150–170°F (66–77°C) as moisture evaporates; this is commonly called the stall and does not mean the smoker has stopped working. When the bark looks dark and set, often near 165°F (74°C), wrap the brisket tightly in unwaxed butcher paper or heavy-duty foil. Wrapping helps it cook through the stall and retain moisture; foil tends to soften the bark more than paper. You can leave it unwrapped for a firmer bark, allowing for a potentially longer cook.
Cook until tender, not just until a number appears. Return the wrapped brisket to the smoker and continue cooking, checking periodically. For food safety, the USDA FSIS safe minimum for a whole cut of beef is 145°F (63°C) followed by a 3-minute rest, measured with a food thermometer; brisket is usually cooked well beyond that because it needs time to become tender. A common finishing range is 195–205°F (91–96°C), but temperature is only a guide. Insert the probe into several spots in the thickest section: it should slide in with little resistance, like softened butter. If it still feels tight, keep cooking and check again in 20–30 minutes. Do not pull it simply because it has reached 195°F if the meat is still firm.
Rest, then slice. Transfer the wrapped brisket to a tray and rest it for 90 minutes. Keep it wrapped; a clean insulated cooler can help hold warmth for this rest. If holding it longer than 2 hours, keep the meat at 140°F (60°C) or hotter. Unwrap carefully, saving any juices to spoon over slices. Find the direction of the grain and slice across it into roughly ¼-inch (6 mm) slices. The grain can change direction near the point where the flat meets the point, so turn the brisket as needed. If slices crumble, cut them a little thicker; if they seem chewy, check your cutting direction.

Tips

Allow a timing buffer. Brisket cooks at its own pace. Although this recipe budgets about 8 hours in the smoker for a 5 lb flat, thickness, starting temperature, smoker accuracy, and weather can shift the finish by several hours. Plan to have it ready early rather than scheduling dinner around the earliest estimate. A wrapped brisket can rest safely for a limited time, but keep it above 140°F (60°C) if holding it longer than 2 hours.
Use a thermometer and test more than one spot. A smoker’s built-in reading may not match the temperature beside the brisket. A separate probe helps you monitor the meat without repeatedly opening the door. Check the thickest part and avoid touching fat or the rack, which can distort the reading.
Adjust the seasoning to your salt. Kosher salt crystal sizes vary by brand. If using fine table salt, use about 2 teaspoons (10 g) instead of 1 tablespoon, then season to taste next time. The black pepper and garlic are easy to adjust; paprika is optional and adds a mild smoky-sweet note, not heat.
Don’t overtrim or over-smoke. Leaving a thin fat layer helps protect the lean flat, while a heavy layer will not render evenly. Use a modest amount of wood and follow your smoker’s instructions; too many chips can create harsh smoke. Oak is a balanced choice, while hickory is more assertive and pecan is generally milder.

Serving Suggestions

Serve the sliced brisket hot with its collected juices, barbecue sauce on the side, and simple accompaniments that balance its rich, smoky flavor. Coleslaw, potato salad, cornbread, baked beans, pickles, and sliced raw onion all work well. For a straightforward plate, allow about 6–8 oz (170–225 g) cooked brisket per person, adjusting for appetites and the number of sides. Keep slices together on a warm platter rather than piling them high; this makes it easier to serve neat portions and helps prevent the lean flat from drying out. Leftover slices are also good in sandwiches, tacos, or a baked potato.

Variations

Use a whole packer brisket. A packer includes both the lean flat and fattier point and often weighs 10–14 lb (4.5–6.4 kg) after trimming. It needs much longer than this 5 lb flat—often 12–18 hours at 225°F (107°C), with substantial variation. Follow temperature and tenderness cues, and make sure your smoker has room for the cut without blocking airflow.
Change the wood. Oak gives a steady, moderate smoke flavor; hickory tastes stronger, while pecan is gentler. Fruit woods such as apple can be used for a lighter aroma. Choose chips rather than chunks if that is what your electric smoker is designed for, and do not mix wood types unless your appliance allows it.
Make the rub spicy or sweeter. Add ½ tsp (1 g) cayenne for a noticeable kick, or 1 tbsp (12 g) brown sugar for a sweeter crust. Sugar can darken more quickly, so watch the bark and wrap when it is set rather than waiting for a particular color alone.
Cook it unwrapped. Leaving the brisket uncovered throughout develops a firmer, drier bark, but can lengthen the cook and increase moisture loss. Keep the smoker temperature steady and rely on the tenderness test. If the exterior is becoming too dark before the center softens, wrapping is a practical mid-cook adjustment.

Storage and Reheating

Refrigerate cooked brisket within 2 hours of cooking. For faster cooling, divide a large piece into smaller portions and place it in shallow, airtight containers; store slices with a little cooking juice so they are less likely to dry out. Refrigerated brisket keeps for 3–4 days. Freeze tightly wrapped portions for about 2–3 months for best quality, and thaw them in the refrigerator rather than on the counter.

Reheat only the portion you plan to serve. Put brisket in a covered oven-safe dish with a spoonful or two of its juices or water and warm gently at 300°F (149°C) until hot throughout. You can also reheat slices covered in a skillet over low heat with a splash of liquid, or microwave them in short bursts under a cover. Check the center with a thermometer: leftovers should reach 165°F (74°C). Avoid prolonged high heat, which can make lean slices tough.

Frequently Asked Questions

How many hours does brisket take in an electric smoker?
At 225°F (107°C), estimate about 1 to 1½ hours per pound as a rough planning range. A 5 lb flat may take around 7–10 hours, while a large whole packer can take much longer. Shape and thickness matter as much as weight, so start checking tenderness before the expected finish and leave room in your schedule.

What temperature should I set my electric smoker to?
Set it to 225°F (107°C) for a traditional low-and-slow cook. Some cooks use 250°F (121°C) to shorten the schedule, but the brisket may cook faster and the bark can develop differently. Whichever temperature you choose, use a thermometer to check the meat and confirm that it becomes tender before slicing.

Should brisket be smoked fat-side up or down?
Orient the fat cap toward the main heat source. In many electric smokers with heat rising from below, that means fat-side down, which can shield the meat from direct heat. If your smoker heats from a different direction, position the fat accordingly and follow the appliance manual.

Do I have to wrap brisket in an electric smoker?
No. Wrapping in foil or unwaxed butcher paper is optional. It can help the brisket move through the stall and finish sooner, while leaving it unwrapped usually produces a firmer bark but may extend the cook. Wrap once the exterior looks well formed, rather than wrapping according to the clock alone.

Why is my brisket tough even though it reached 200°F?
It may need more time: some briskets are not tender at 200°F, and the probe should slide in easily in several places. Another common cause is slicing with the grain, which makes each bite seem tougher. Let the meat rest, identify the grain, and cut across it. Also check that your thermometer is positioned in the thickest part rather than in a fat seam.

Can I smoke brisket the day before serving?
Yes. Cook it until tender, rest it, then refrigerate it promptly within 2 hours. Store it whole or in large pieces with its juices in a covered container, and reheat covered until it reaches 165°F (74°C). Keeping it in larger pieces generally helps it retain moisture better than storing thin slices.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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