These muffins seem to be a little moister than most cornmeal muffins. I think soaking the cornmeal in the buttermilk is what makes a difference. I always use finely ground cornmeal, but you can use the regular cornmeal if you like the grittier texture it provides. I always use butter, not margarine, a personal preference. I never use Splenda, but imagine it would work for those with dietary restrictions. I will sometimes add some toasted wheat germ, no more than about 1/4 cup in this recipe, just to give it a bit of a nutritional boost. As with most cornmeal muffins, these are best served the day they are baked. I don't know how well they freeze, the kids eat them up too quickly. I can't remember where I found the recipe, but thought I would post it here for safe keeping. Update to this recipe. I have added honey on to the ingredient list. I usually use honey instead of sugar when I make these. It adds a bit of flavour as well as making them moister.