In a large pot, heat up 1 gallon of water over medium heat until it comes to a simmer.
Add coarse canning salt or kosher salt, brown sugar, Worcestershire sauce, minced garlic, and ground black pepper to the pot. Stir until everything is dissolved.
Once the mixture has cooled, add the remaining 1 gallon of cold water and stir.
Add the turkey brine to a food-grade bucket or container large enough to hold your turkey.
Carefully submerge the turkey in the brine, if necessary, add more water so the turkey is completely submerged
Refrigerate the turkey in the brine for at least 12 hours, but no longer than 48 hours.
After the brining time is up, remove the turkey from the brine and rinse it with cold water. Pat it dry with paper towels and get ready to start smoking turkey!