Grampy Geoff Havens's Whole-Wheat Waffles

Ingredients

• 1 1/4 cups all-purpose flour
• 1 cup whole-wheat flour
• 1 tablespoon plus 1 1/2 teaspoons baking powder
• 1/2 teaspoon plus 1/8 teaspoon ground cinnamon
• 1/4 teaspoon plus pinch of freshly grated nutmeg
• 1/4 cup plus 1 1/2 teaspoons vegetable oil
• 3 tablespoons honey
• 5 large eggs
• 2 cups milk, plus more as needed
• 1 1/2 teaspoons pure vanilla extract
• 1 tablespoon molasses
• nonstick cooking spray, for waffle iron
• pure maple syrup, for serving (optional)
• blueberries, for serving (optional)