How to Make It
In a large saucepan, bring 8 cups of water to a boil. Add the tea bags and steep for 5 minutes; discard the tea bags. Add the mint leaves and let cool completely in the saucepan, then refrigerate until well chilled, about 2 hours.
Meanwhile, in a small saucepan, combine the sugar with the cocoa nibs, vanilla bean and seeds and 1/2 cup of water. Bring to a boil, stirring to dissolve the sugar. Let cool completely, then strain the syrup through a fine sieve; discard the solids. 3. Strain the chilled tea through a fine sieve into a pitcher; discard the mint and tea bags. Stir in the cocoa nib syrup. Serve the tea in ice-filled glasses with sprigs of mint.
The iced tea can be refrigerated for up to 2 days. The cocoa nib syrup can be refrigerated for up to 1 month.