The present application is directed to various embodiments of cold-brew green tea compositions, methods of preparing a cold-brew green tea beverage, an infusion bag for cold brewing green tea, and a green tea cold brewing system. In at least one embodiment, the cold-brew green tea composition comprises a mixture of green tea leaf pieces and powdered green tea leaves. Mixing the cold-brew green tea composition in chilled water may produce a green tea beverage having a high concentration of catechins.
