Combine water, chai masala, and ginger in a saucepan.
Bring the mixture to a boil on medium-high heat.
Reduce the heat to low and let it simmer for 3-4 minutes.
Add tea leaves and milk and simmer for 2 more minutes.
Add mint leaves and cook for 30 seconds. Do not overcook after adding the mint leaves otherwise the tea will turn bitter.
Strain the tea in a jug and stir in jaggery.
Pour the tea into serving cups and serve hot.
You can also strain the tea directly in serving cups and add jaggery into the cups themselves.