If you don't have any buttermilk you can easily make a substitute. Pour 1 tablespoon of vinegar into a 1 cup measure and then fill the rest of the measuring cup with milk. Gently stir the mixture and let it rest for about 5 minutes.
To Keep Waffles Warm
I think waffles are best served immediately as they come off the waffle iron. If you prefer to cook the full batch of waffles and serve them all at once, preheat your oven to 225 degrees F. Transfer each waffle to the oven, placing it directly on the oven rack, and quickly close the oven so it will hold the heat.
To Reheat Refrigerated Waffles
Reheat leftover refrigerated waffles in your toaster oven or standard toaster until nicely crisped. I don't recommend reheating them in the microwave for the best result.
Allow the waffles to cool completely. Line a baking sheet with parchment or wax paper. Lay the waffles out on the baking sheet in a single layer with a bit of space in between. If you have more than one layer of waffles to freeze, top the first layer with another sheet of parchment or wax paper and stack another layer of waffles on top. Use a 2nd baking sheet if you have more than 2 layers to freeze. Transfer the baking sheet to the freezer for 2 to 3 hours or until the waffles are frozen solid.
Transfer the completely frozen waffles to a freezer safe gallon sized plastic storage bag. Press out as much air as possible and seal the bag. Use a permanent marker to label the bag with the date and store it in the freezer. Once frozen, they won't stick to each other and you can remove as many as you'd like for reheating.
For the best quality, use frozen waffles within 3 months.
To Reheat Frozen Waffles
Use your toaster or toaster oven to reheat and crisp individual waffles to your liking.
For a larger batch of waffles, lightly coat a baking sheet with nonstick cooking spray and preheat your oven to 350 degrees F. Transfer waffles to the prepared baking sheet and bake for 10 minutes.
This recipe yields 6 (6-inch) round traditional waffles with my Cuisinart Round Classic Waffle Maker.
Nutrition information was calculated for 1 Buttermilk Cornbread Waffle with 1 teaspoon Maple Honey Cinnamon Butter.