"I use the Simply Heinz brand of ketchup - other brands may differ in flavor and sweetness so taste as you go to make sure it's spot on. Also, if you'd rather, the beans can be cooked in a slow cooker on low for 4 hours instead of in the oven. I use a 3-quart baking dish for these beans which is a little smaller than a 9X13. If you are going to use a 9X13-inch, decrease the baking time slightly so the beans don't dry out since they'll be in a thinner layer...."