01 -
Preheat the waffle iron to a medium-high to high setting.
02 -
In a medium bowl, whisk together the whole milk, egg yolks, vegetable oil, and vanilla extract until smooth. Set aside.
03 -
In a large bowl, whisk together the all-purpose flour, cornstarch, light brown sugar, cinnamon, nutmeg, baking powder, baking soda, and coarse salt until evenly blended. Set aside.
04 -
In a separate bowl, beat the egg whites with an electric mixer until stiff peaks form.
05 -
Pour the wet ingredients into the bowl with the dry ingredients and stir gently until just combined, making sure to scrape the bottom of the bowl.
06 -
Gently fold the whipped egg whites into the batter, being careful not to deflate them.
07 -
Ladle or scoop batter into the preheated waffle iron, filling it two-thirds to three-quarters full. Close the lid and cook until the waffles are crisp and golden on the outside, about 5 minutes per batch. Repeat until all batter is used.
08 -
Serve the waffles warm with maple butter and warmed maple syrup.