Fold in the chopped strawberries and mix until they're just combined. Some small pockets of dry ingredients may remain. That's ok.
Preheat waffle maker according to your machine's instructions.
Spray waffle maker plates with cooking spray.
Pour ~1/3 cup of batter into the center of the waffle maker.
Close waffle maker and cook until indicator light (if any) shows it is ready.
Remove with tongs and serve with butter, chopped strawberries, maple syrup, whipped cream, etc.
Notes
If your waffle maker does not have an indicator light to let you know when they are ready, most waffles will be done when steam no longer escapes from the side of the waffle maker.
Storing leftovers: Allow the waffles to fully cool before storing them in an air-tight container in the fridge for 4-5 days.
This recipe uses whole milk but also works wonderfully with buttermilk.