Prepare the rub in a plastic cup and shake well, spread evenly across the brisket. Be cautious with the ammount.
Allow rub to marinate on brisket for at least 2 Hours
Allow brisket to cook for 2h to 2:30h for each kg at 105-120 °C. Fat side up
Spray the brisket when it needs some extra moisture, you can do this with water, beer, hot sauce, soy sauce, worcestershire sauce, apple cider vinegar, …
When the brisket starts to look too dry, you kan wrap it in aluminium foil or butcher paper.
Sauce
In a medium saucepan over medium-low heat, melt butter and add the onion and celery. Cook for 4 to 5 minutes until the onions and celery are soft.
Add the minced garlic and cook for only 15 to 20 seconds and no longer.
Add the water and bouillon cube. Stir until the bouillon is dissolved.
Add remaining ingredients and simmer on low for about 15 minutes, stirring occasionally.
Remove the sauce from the heat and allow it to cool for 15 minutes.