In a large bowl, whisk together the flour, baking powder, and sugar.
In a medium bowl, whisk together the eggs, buttermilk, melted butter, and vanilla until smooth.
Add the wet mixture to the dry and whisk until just combined with no lumps. Allow the batter to rest for 15 minutes.
Prepare oven for warming, 170°F. Note: If you have a larger air fryer with a 'keep warm' setting or a toaster oven with a warm setting, you can use that as well. You just don't want them to continue cooking and getting overcooked.
Heat a waffle iron over medium heat.
Lightly spray the iron with cooking spray. For a 8-inch waffle maker, add a heaping ½ cup of batter and gently smooth it out to the edge. Close the lid.
Cook for 3-4 minutes until golden brown and cooked through. Remove the waffle and place it on a wire rack over a sheet tray. Place into the warming oven while you make the additional waffles.
Add the next finished waffle to the wire rack in the oven to keep warm until they are all cooked.
Serve immediately with butter and maple syrup if desired.
Notes
Please refer to my FAQ’s (Frequently Asked Questions) and ingredient list above for other substitutions or for the answers to the most common questions.
Note: I usually use an olive oil nonstick cooking spray for using a waffle iron or air fryer because I find it doesn't gunk it up like other nonstick sprays.