Pour the apple cider into a saucepan and place it over medium heat.
Add the cranberries, cinnamon sticks, and cloves to the cider, and stir gently to combine.
Bring the mixture to a gentle simmer, allowing the spices and cranberries to release their flavors, and the cranberries to soften and slightly burst, creating a vibrant red hue.
Reduce the heat to low and let it simmer uncovered for about 15-20 minutes, stirring occasionally.
Taste the cider and add sugar or honey if desired, stirring until dissolved and the drink reaches your preferred sweetness.
Remove the saucepan from heat, strain if you prefer a smoother drink, or leave the cranberries and spices in for a more rustic presentation.
Pour the mulled cider into mugs, ensuring some of the fragrant spices and cranberries remain in each serving for visual appeal and added flavor.