1/2 c. rum
3 c. apple cider
1 tbsp. plus 1 tsp. brown sugar
1 tbsp. plus 1 tsp. butter, divided
4 (3") sticks cinnamon

Combine first 3 items in a saucepan; bring to a boil, stirring until sugar dissolves. Pour into 4 mugs. Add 1 teaspoon butter and 1 stick cinnamon to each mugs.