Vanilla straight up! Gone is our Vanilla Borealis due to a dry-up in supply of an integral ingredient but the replacement is just smooth and simple Vanilla black tea. Caffeine Level: High Caffeine. Country of Origin: Sri Lanka. Ingredients: Black tea and natural vanilla flavouring. Steeping Suggestions: 1 teaspoon of tea (3g) per 6oz cup of water, 100°C (212°F) for 3-6 minutes.