How to slow cook small brisket in oven at 300 with a dry rub and the most amazing sauce to keep it nice and fork tender when it's done. Out of this world YUM!
Rinse off brisket and pat dry with paper towels. Preheat oven to 300 degrees F.
Lay meat flat on a cutting board. Pour half rub on top and rub/pat on so there's a nice thick coat. Flip over and do the same thing on the bottom.
Put foil on a baking sheet and lay brisket on top, allow excess rub to fall off on cutting board.
Pour excess from board on top of meat and press on again. Cover pan with meat on top with foil.
Bake for 3 hours. Before taking it out add sauce ingredients into a small saucepan on the stovetop. Boil until onions are softened.
Take meat out, take foil off and pour 1/3 - 1/2 of sauce on top of meat. (if sides of pan aren't too high just pour on 1/3, you don't want it to be higher than 1/2 way up sides)
Put foil back on the top and put back into the oven for 1.5-2 hours (mine was 3.2 lbs. and 1 1/2 hours was enough, larger would need more time to get tender) until meat is fork tender. Ideal internal temperature for fall-apart texture is 195-203F.
Then take foil off and bake uncovered for 30 minutes so outsides can get nice and brown.
Remove pan and put foil back on top to let meat rest for 30 minutes before slicing. Serve slices with a side dish with some of the remaining sauce poured on top to make it super moist.