In a cup, mix garlic powder, smoked paprika, brown sugar, chipotle chili powder, ground cumin, dried oregano, and kosher salt.
Rub this spice blend all over the beef brisket.
Place the brisket into a large zip-close plastic bag. Squeeze out the air and seal the bag. Refrigerate for at least 6 hours or up to 8 hours, turning the bag once or twice during marinating.
Place the brisket in a 6-quart Instant Pot. If needed, cut the brisket in half and stack the pieces.
In a glass measuring cup, mix beer, barbecue sauce, and Worcestershire sauce. Pour this mixture over the brisket in the Instant Pot.
Lock the Instant Pot lid, making sure the vent is closed. Cook according to Instant Pot directions until the brisket is tender.
Transfer the cooked brisket to a cutting board. Cover loosely with foil and let it rest for 15 minutes.
Press the Sauté function on the Instant Pot and set for 15 minutes. Boil the juices in the pot, uncovered, until reduced to about 1½ cups, which takes about 8 minutes. Turn off the pot.
Pour the juices into a fat separator, or into a glass measuring cup. Pour off or skim the fat and discard it.
Stir apple cider vinegar into the juices.
Slice the brisket thinly across the grain into 24 slices and arrange them on a serving platter.
Spoon some pan juices over the sliced brisket. Serve with the remaining pan juices.
Notes
Serving Size - 3 Slices Brisket and 3 Tablespoons Pan Juices2 WW Points
Tips and Tricks
Marinating Time: For deeper flavor, marinate the brisket overnight in the fridge.Slicing Brisket: Always slice brisket across the grain for tender pieces.Sauce Separation - Separating Fat: A fat separator helps keep the sauce rich but not greasy.
Storing and Reheating
Reheat on Stovetop - Place a serving in a saucepan with 1 to 2 tablespoons water. Warm over low heat, stirring until creamy.Storing - Store leftover brisket in an airtight container in the fridge for up to 4 days.Freezing - Freeze sliced brisket in portions for up to 2 months.