1. Combine prosecco and apple cider in a shaker. Add in a squeeze of orange and a pinch of cinnamon sugar. Shake until well combined.
2. Run an orange slice around the rim of your glasses. Carefully dip the glasses onto a small plate lined with the cinnamon sugar and turn until well coated.
3. To serve, add 3 ice cubes to each glass, pour in the apple cider mixture and garnish with apple and orange slices.