Combine the flour, sugar, baking soda, baking powder, and salt in a medium bowl and stir using a balloon whisk to combine.
Add the wet ingredients: buttermilk, butter, and vanilla, and mix until smooth. Do not over mix; otherwise, the waffles will be heavy when cooked. Let the batter rest at room temperature for 10 minutes.
Preheat a waffle iron according to the manufacturer's instructions.
Spray the waffle iron with non-stick cooking spray. Pour the batter into the waffle iron and cook according to the manufacturer's instructions, usually for 2 to 3 minutes. PRO TIP: your waffles most likely be ready when you don't see more steam coming out of the side of the waffles maker.
Place in a 200º F (95º C) oven to keep waffles warm while you finish with the rest of the batter. I recommend placing the waffles directly on the oven rack in a single layer; this way, the heat will circulate properly, and the waffles will retain their crisp texture.
Store in an airtight container in the refrigerator for up to 5 days. You can keep waffles for as long as three months in the freezer.Freeze: Wrap the cooled waffles in wax paper and then stack them all in a gallon-size freezer bag. Close the bag and make sure to squeeze out as much air as possible to prevent freezer burn.Reheat: Remove the waffles from the refrigerator or freezer, use your toaster or toaster oven to reheat, and crisp individual waffles to your liking. Or in the oven at 350º F (180º C) for 8-10 minutes, or until warm. How To Keep Waffles CrispPlace the waffles in a 200°F oven to keep them warm and crisp while you finish with the rest of the batter. PRO TIP: I recommend placing the waffles directly on the oven rack in a single layer; this way, the heat will circulate properly, and the waffles will retain their crisp texture.Extra Tips:
Do not overmix the batter, it is okay if it’s a bit lumpy.
Preheat your waffle maker and lightly oil with vegetable or canola oil. Cooking spray isn’t recommended as it can cause a sticky residue.
Put enough batter so the waffle hole is almost full, that will ensure you have full-shaped waffles.