Preheat your waffle maker according to the manufacturer's instructions.
In a bowl, whisk together the Gulab Jamun mix, all-purpose flour, sugar, baking powder, baking soda, and cardamom powder.
In another bowl, mix together the milk and melted butter.
Add the wet ingredients to the dry ingredients and stir until just combined. Be careful not to overmix; a few lumps are okay.
Lightly grease the waffle maker with cooking spray or melted butter.
Pour half of the batter onto the preheated waffle maker and cook according to the manufacturer's instructions.
Once the waffle is cooked and golden brown, repeat the process for the second waffle.
Drizzle Gulab Jamun syrup over the waffles and garnish with chopped nuts if desired.
Serve the Gulab Jamun Mix Waffles warm and enjoy this delightful treat for two!