PREHEAT your waffle iron according to the manufacturer’s directions.
WHISK together the flour, baking cocoa, baking powder, salt, cinnamon, nutmeg, and sugar in a large bowl.
IN A MEDIUM BOWL, whisk together the eggnog, eggs, butter, and vanilla.
COMBINE the wet mixture with the dry mixture and stir until just combined; do not over mix.
STIR IN the chocolate morsels.
SPRAY the preheated waffle iron with non-stick cooking spray.
POUR the waffle batter into the waffle iron in batches.
COOK according to manufacturer’s directions until golden brown, about 2 to 3 minutes per waffle.
SERVE warm and top with whipped cream if desired.