Vanilla chai blends commonly use black tea or green tea as their base; product descriptions mention both "black tea" and "green tea" in different blends.
Common flavor components are vanilla plus chai spices, with specific mentions of cinnamon, caramel and other warming spices.
For hot tea, steep a vanilla chai bag in hot water — examples show steep times of about 2–4 minutes. For iced tea, steep slightly longer per the package directions, then pour over ice or chill before serving.
Descriptions mention vanilla, caramel, honey, and additions such as milk or other sweeteners to provide sweetness and creaminess.
Most listings are labeled caffeinated, and one product description explicitly states that a vanilla caramel chai contains less caffeine than coffee.