3 1/2 quarts water
15 slices fresh ginger, peeled
15 green cardamom pods, split open and seeded
25 whole cloves
3 cinnamon sticks
3 whole black peppercorns
8 black tea bags
1 (14 ounce) can sweetened condensed milk
Pour water into the crock of a slow cooker. Stir in the ginger, cardamom pods, cloves, cinnamon sticks, and peppercorns. Turn to High; simmer for 8 hours.
Steep tea bags in the hot spiced water for 5 minutes. Strain tea into a clean container. Stir in sweetened condensed milk; serve hot.