Prepare the barbecue for direct cooking over medium heat (180°C to 230°C) with a Weber frying pan or hotplate.
Whisk the milk, egg, Grand Marnier and vanilla together in a jug until just combined.
In a separate bowl, mix the flour, mixed spice, bicarbonate of soda and sugar. Make a well in the centre of the dry ingredients , add the milk mixture and melted butter. Whisk until well combined.
Once the barbecue is preheated, carefully place metal cookie cutters in the frying pan or on the hotplate, leaving a gap between each cookie cutter. Spray the cookie cutters and hotplate/frying pan with cooking spray to grease.
For each pancake, spoon a couple of tablespoons of mixture into each cookie cutter. Cook the pancakes over direct medium heat for 1 to 2 minutes, with the lid closed.
Open the lid, flip the pancakes (still in the cookie cutters) , continue to cook for a futher minute.
Pop the pancakes out of the cookie cutters. Serve the pancakes with ice cream and maple syrup.