In large mixing bowl, add dry ingredients (Flour, Cornstarch, Sugar, Nutmeg, Salt, Baking Powder and Baking Soda) and whisk until combined.
Add wet ingredients (Buttermilk, Vegetable Oil, Vanilla Extract and Eggs) to bowl with dry ingredients and mix until just combined.
Preheat waffle iron on desired setting (use setting #4 for best results) and close the iron. Depending on model, an red indicator light may come up
Depending on model, once waffle iron is ready, the red indicator light will cut off or turn green, and you will hear a beeping sound. Open and iron and slowly pour batter into bottom part of iron.
Use cooking spoon or another cooking tool to ensure batter is evenly spread around in the batter.
Lower the top of the batter and allow the batter to cook undisturbed.
Depending on model, once the waffle is ready, the green indicator light will pop on and you'll hear a beeping sound. Alternatively, wait for the steam to completely subside.
Lift top of waffle iron and carefully remove waffle with tongs, then repeat steps until all of the batter is gone.