Begin by preheating the waffle iron in accordance with the manufacturer's guidelines.
In a large mixing bowl, combine the flour, sugar, baking powder, salt, nutmeg, and cinnamon, whisking them together thoroughly.
In another bowl, mix the eggnog, eggs, melted butter, and vanilla extract until well blended.
Slowly incorporate the wet mixture into the dry ingredients, stirring gently until just combined to avoid overmixing.
Lightly coat the waffle iron with cooking spray or butter.
Pour approximately 1/2 cup of batter onto the preheated waffle iron for each waffle.
Cook the waffles until they achieve a golden brown and crisp texture, which should take about 3 to 4 minutes.
Serve the waffles warm, accompanied by your preferred toppings, such as whipped cream, maple syrup, or a sprinkle of powdered sugar.