In a saucepan, bring 4 cups of water to a boil. Remove from heat and add the tea bags and the pinch of baking soda (if using). Let the tea steep for 5-7 minutes.

Remove and discard the tea bags. Stir in the granulated sugar until completely dissolved. Pour the hot tea mixture into your large pitcher and add the remaining 4 cups of cold water. Refrigerate the sweet tea until it is thoroughly chilled, at least 2 hours.

Fill individual glasses with ice. Tall glasses or mason jars are perfect. Pour the Bourbon Sweet Tea over the ice and garnish with a fresh lemon slice and a sprig of mint.