Tender, juicy and fall apart delicious, once you cook Beef Brisket in the Slow Cooker, you may never want to do it any other way again! It's mostly hands off, super easy and makes the house smell irresistibly delicious as it slowly cooks up to perfection.
Season GENEROUSLY with the dry rub, using as much of it as it takes to cover the entire thing, front, back and on all sides.
Use your hands to rub the seasonings into the meat.
In a bowl, mix the beef broth, soy sauce, mustard and worcestershire sauce until well combined.
Spread the onions and garlic out into the bottom of the crockpot.
Place the brisket on top, fat side up. Pour the broth mixture over top. It won't fully submerge the meat...and that's okay but feel free to press it down a little with the back of a spatula. If time allows, mariate for 6-8 hours or up to overnight*
Cook on low heat for 8-10 hours (depending on your crockpot and size of your brisket). Start checking at the 8 hour mark and every 30 minutes thereafter...mine took exactly 8 hours.
It's done when it's fork tender and an instant meat thermometer registers 195°F-205°F.
Carefully transfer the brisket to a parchment lined baking sheet and broil in the oven on high, for 5-10 minutes or until the top crisps up nicely.
Meanwhile, thicken the gravy. In a small bowl, mix the arrowroot powder with a few tablespoons of the liquid from the crockpot then stir it back in. As long as the liquid in the slow cooker is still bubbling and hot, it should thicken up slightly within a few minutes. If not, transfer the mixture to the stove and thicken it up over medium heat instead.
Let the brisket rest on a cutting board for at least 20 minutes before slicing or shredding. Seve with the caramelized onions and garlic and thickened juice from the crockpot.
Notes
I like to throw everything in the crockpot the night before and put it in the fridge so all I have to do in the morning is plug it in! Don't fret if you forgot or don't have the time as you'll still end up with an incredibly flavourful piece of meat. However, as with most meats, marinating them in advance will allow the flavours to develop more resulting in more profound flavours.