Combine all spices (cinnamon, cardamom, ginger, cloves, allspice, and black pepper) in a small bowl and whisk thoroughly to create your chai spice mix.
Preheat your waffle iron according to manufacturer instructions. For best results, set to medium-high heat.
In a large bowl, whisk together the flour, sugar, baking powder, salt, and 1 tablespoon of your chai spice mix.
In a separate bowl, whisk together the eggs, milk, melted butter (or oil), vanilla extract, and brewed tea (if using).
Pour the wet ingredients into the dry ingredients and stir until just combined. A slightly lumpy batter is ideal. Let the batter rest for 5 minutes.
While the batter rests, prepare the apple topping. Peel, core, and dice the apples into 1/4-inch pieces.
In a medium skillet over medium heat, melt the butter, then add the apples, brown sugar, and 1 teaspoon of chai spice mix. Cook for 5-7 minutes, stirring occasionally, until the apples are tender and slightly caramelized.
Ladle the batter onto the preheated waffle iron (approximately 1/3 cup per waffle section). Cook until golden brown and crisp, about 3-5 minutes or until steam stops escaping from the waffle iron.
Transfer waffles to serving plates, top with the warm spiced apple mixture, and add optional toppings of your choice. Serve immediately for maximum crispness.