Trim brisket of all fat and if necessary cut it to fit in your crock pot. Sprinkle with onion soup mix and garlic powder. Pour coca-cola over the mix. Cover and cook on low for 8 to 10 hours. Serve.
However, I usually cook this the night before I plan to serve it. In the morning I remove it from the crock pot. Cool and refrigerate it until dinnertime. Then I skim the fat, remove the meat from the broth and cook it in the oven at 400 degrees until browned and crispy. Then it can be slliced or shredded. Sliced I use it for dinner. Leftovers can be used for tacos, barbeque or sandwiches.