Step 1Rinse the tangerines and separate the peels from the fruit, reserving the peels. Squeeze 3 cups of tangerine juice from the tangerines.
Step 2Remove the white pith from the zest of about 12 tangerines. Cut the zest into strips until you have 2 cups zest.
Step 3Combine the Armagnac, juice, zest and simple syrup in a large resealable jar. Toast the clove slightly in a pan over medium heat, just until fragrant, and add it to the Armagnac mixture. Crush the cardamom pod with a mortar and pestle and add it to the mixture. Seal the jar, shake it and store it in a dark place for 2 months, shaking every day or so.
Step 4After 2 months, strain the zest and spices from the liquid and discard. Let the remaining solids collect on the bottom of the jar. Pour off the liquid and discard the solids. Refrigerate to preserve the acidity. Makes about 7 1/4 cups.