Rou Gui (Cassia Oolong)
China — Wuyi, Fujian
Oxidation: heavy
Harvest: spring
Tasting Profile
Cinnamon-like spice with roasted warmth
Spicy, cinnamon with roasted depth
Full-bodied, warming
Warm, spicy, lingering cinnamon
Brewing Guide
Temperature
90-100°C
194-212°F
Steep Time
1-1 min
Leaf Amount
3g / 100ml
Max Infusions
7
About This Tea
From the renowned tea-growing region of Wuyi, Fujian in China comes Rou Gui (Cassia Oolong), a tea prized by connoisseurs and casual drinkers alike. The leaves are partially oxidized through a meticulous process of withering, bruising, and controlled oxidation that can range from light and floral to dark and roasted, a method that has been refined over centuries to capture the essence of the terroir in every cup. The specific microclimate of Wuyi, Fujian — its rainfall patterns, altitude, and soil composition — contributes to a flavor profile that cannot be truly replicated anywhere else in the world.
The sensory experience of Rou Gui (Cassia Oolong) begins with its aroma — cinnamon-like spice with roasted warmth. Upon tasting, one discovers spicy, cinnamon with roasted depth. This complexity of flavor makes Rou Gui (Cassia Oolong) a fascinating tea to explore, as each brewing reveals new nuances and subtleties that reward attentive drinkers. The tea is moderate in caffeine with 25-40 mg per cup, providing gentle alertness without the jitters, adding to its versatility as a daily companion.
Chinese tea culture, one of the oldest and most sophisticated in the world, has elevated tea preparation and appreciation to an art form spanning thousands of years.
Preparing Rou Gui (Cassia Oolong) requires attention to temperature and timing. Water at 90°C to 100°C brings out the best qualities of the leaf, while steeping for 30 to 1 seconds achieves the ideal balance of flavor and body. A ratio of 3.0g per 100ml of water is recommended. With up to 7 possible infusions, each cup provides a new opportunity to appreciate the nuances of this exceptional tea.
Today, Rou Gui (Cassia Oolong) continues to be celebrated both in its homeland and by tea enthusiasts around the world. Its unique flavor profile has earned it a devoted following among those who appreciate the art and science of fine tea. Whether enjoyed as a daily ritual or reserved for special occasions, Rou Gui (Cassia Oolong) represents a connection to centuries of tea tradition and the ongoing pursuit of excellence in every cup. The growing global interest in specialty teas has brought renewed attention to this variety, ensuring that the artisanal techniques behind its production continue to thrive.
Health Benefits
Caffeine Deep Dive
compared to coffee (95 mg)
Based on the FDA guideline of 400 mg/day, you can safely drink up to 12 cups per day.
Track your daily intake with the Caffeine Calculator →Serving Suggestions
Pairs Well With
Recommended Teaware
🛒Shop Rou Gui (Cassia Oolong) on Amazon

TIAN HU SHAN Premium Oolong Tea Loose Leaf 14 Ounce (400g)
Premium Quality Oolong Tea: Tian Hu Shan oolong tea is carefully crafted from the finest leaves and processed using strict standards from planting to packaging. With our own tea mountain and factory in Fujian China, you can enjoy this tea with confidence. Manu
$18.99
Buy Now
Wu Mountain Tea Organic Oolong Tea – 1 lb Loose Leaf – Premium Whole Black Chinese Tea Leaves – Smooth Aroma, Low Astringency, Naturally Energizing – Perfect for Hot & Iced
100% Organic Loose Leaf Oolong Tea - Authentic whole-leaf oolong grown on organic farms using traditional cultivation. Never crushed, chopped, or dust-grade. You get intact leaves that unfurl beautifully in water, releasing deeper flavor, fuller body, and a ri
$31.99
Buy Now
VAHDAM, High Mountain Oolong Tea Leaves From Himalayas (50+ Cups, 3.53oz) Strong & Robust Oolong Tea | High Elevation Grown | Vacuum Sealed | Brew Hot, Iced, Kombucha Tea | Loose Leaf Tea
HIGH MOUNTAIN OOLONG TEA - Immerse yourself in the refined essence of our High Mountain Oolong Tea. Handpicked from the prestigious Himalayan plantations, this loose-leaf Oolong tea offers a light and floral-fruity character, renowned for its subtle flavors. W
$14.99
Buy Now
The Tao of Tea, Black Dragon Oolong Tea, Loose Leaf, 3.5 Ounce Tin
Handcrafted oolong tea Toasted aroma with a sweet, strong, grain aftertaste.
$12.54
Buy Now
NASLAPH Roasted Oolong Tea Loose Leaf, High Mountain Black Oolong Tea Leaves with Mellow and Smooth, Oolong Tea with Medium Roasted Flavor, Grade AAA Oolong Tea with Consistent Quality 5.29Oz/150g
Traditional Charcoal Roasting, Distinctive Roasted Aroma. We medium roasted oolong tea uphold the ancient charcoal roasting technique using fruit wood charcoal, with low-temperature and slow roasting refined repeatedly. The gentle, warm aroma of charcoal slowl
$14.99
Buy Now
TIAN HU SHAN Premium Oolong Tea Loose Leaf 7 Ounce (200g)
Premium quality: We have our own tea mountain and factory in Fujian China, implementing strict standards at every step from planting to packaging. Manually pick the tender leaves of oolong tea, and select the best products between the choices. Unique flavor: R
$11.98
Buy NowAs an Amazon Associate, we earn from qualifying purchases. Prices and availability may vary.
Nutrition Facts
Per 240ml serving
Per 240ml serving
| Calories | 2 kcal |
| Caffeine | 25-40 mg |
| L-Theanine | 8-16 mg |
| Polyphenols | 90-180 mg |
| EGCG (Catechins) | 8-20 mg |
| Protein | 0.3 g |
| Total Carbohydrates | 0.4 g |
| Total Fat | 0 g |
| Potassium | 20 mg |
| Magnesium | 3 mg |
| Calcium | 3 mg |
| Sodium | 1 mg |