The increase in Internet usage has made the public gradually proficient in using social media. One standout example of this phenomenon is the surge of co-branded drinks within the tea and coffee beverage sectors. These collaborations have successfully tapped into consumers’ desire for novelty and exclusivity, fueling purchasing enthusiasm. Among these, the “Sauce Flavor Latte” by Luckin Coffee has emerged as a groundbreaking product, capturing widespread attention and propelling the co-branding trend to unprecedented heights. This product’s success not only underscores the power of co-branding but also highlights the critical interplay of factors such as strategic partner selection, innovative product development, a deep understanding of consumer psychology, and effective social media promotion. Luckin Coffee’s collaboration with Kweichow Moutai to create the “Sauce-Flavored Latte” represents a masterclass in leveraging social media for brand amplification. By integrating cultural nostalgia with modern tastes, Luckin effectively catered to diverse consumer demographics, generating curiosity and driving massive online engagement. This case exemplifies how social media can serve as a catalyst for amplifying brand campaigns, turning a product into a cultural phenomenon. This article delves into the intricate mechanisms of social media’s role in the marketing success of the “Sauce-Flavored Latte”, providing a detailed analysis of the strategies employed. Additionally, it aims to offer innovative insights for enhancing the effectiveness of future co-branding efforts within the tea and coffee industries, ensuring sustained consumer engagement and market impact.