In a pot that’s just large enough to hold the brisket, combine the water, salt, sugar, pink salt, garlic, and 2 tablespoons pickling spice. Bring to a simmer, stirring until the salt and sugar dissolve. Remove the pot from the heat, let the brine cool to room temperature, and then refrigerate until the brine is completely chilled.

For a Quick Chill: Bring 1/2 gallon of water to a simmer, add the brine ingredients, and stir until dissolved. Slide the pot off the heat and add 1/2 gallon of ice and water. Make sure the water is cool before adding the brisket.