This is the recipe I always use for baked beans and everyone loves them.  The recipe belongs to Chef Dean Fearing's grandmother from Kentucky.

3 - 15 oz Cans pork and beans
1 large Onion -- finely chopped
12 oz bottle Heinz ketchup
1 tb Yellow mustard
1 1/8 cup Light brown sugar -- packed
1/8cup Molasses
1/8 cup Heinz sweet gherkin pickle juice
1 tsp Apple cider vinegar
Salt -- to taste
Ground black pepper -- to taste
1/2 lb smoked bacon -- thickly sliced
 
Preheat oven to 350 degrees.
   
Combine pork and beans, onion, ketchup, mustard, brown sugar, molasses, gherkin juice, vinegar, salt, and pepper to taste in a 2-quart casserole. Top with strips of bacon in a crisscross pattern. Cover with aluminum foil. Bake in preheated 350 degree oven for 1 1/2 hours. Remove foil for last 30 minutes of baking.  Serve hot or cold.
   
Beans may be prepared up to one day ahead and refrigerated.  Warm in 350 degree oven for no more than 20 minutes.