In a pot, combine water, cinnamon, ginger, cloves, and cardamom. After bringing to a boil, simmer for 15 minutes without a lid.
Tip: Crush the cardamom pods with the back of a spoon to release their floral aroma.
Step 2: Tea Time
Remove the pot from heat. Add tea leaves (or bags) and let steep for 5 minutes. Don’t oversteep! Longer = bitter tea. Stir in sugar until dissolved, then add vanilla.
Step 3: Strain & Store
Strain into a jar using a fine-mesh strainer. Let cool, then refrigerate.
Pro tip: Save the spices! Toss them in oatmeal or smoothies for extra flavor.