- Cook the bacon in a large pot over medium heat until crisp, about 6 minutes. Lift it out and leave about 2 tablespoons of fat in the pot.
- Add the onion and celery and cook until soft, 5 to 6 minutes. Add the garlic and cook 1 minute.
- Sprinkle in the flour and stir for 2 minutes.
- Slowly whisk in the bottled clam juice and the juice from the canned clams until smooth.
- Add the potatoes, bay leaf and thyme. Simmer until the potatoes are tender, about 15 minutes.
- Stir in the clams, milk and cream. Heat gently for 5 minutes without boiling. Remove the bay leaf, season and top with the bacon and oyster crackers.