Smoothie King is capitalizing on National Coffee Day by extending the promotion across two days — September 28 and 29 — giving Healthy Rewards loyalty members a free 12 oz. Coffee High Protein Almond Mocha Smoothie at participating locations nationwide. The one-time redemption is exclusive to program members, making the promotion a direct loyalty-engagement play ahead of the widely observed September 29 holiday.
The Product
The featured smoothie is built on cold brew made from 100% Arabica beans and delivers 14g of protein, 3g of fiber, and 0g of added sugar in a 12 oz. serving. The nutritional profile puts it squarely in the protein-coffee category, which has grown rapidly across foodservice and retail channels as consumers seek functional alternatives to standard coffee drinks. For operators watching beverage innovation trends, the format — blending cold brew with a protein matrix — reflects how smoothie and beverage brands are competing directly with traditional coffee dayparts.
Loyalty as the Lever
Structuring the giveaway as a Healthy Rewards-exclusive offer is a deliberate move to boost membership activation and app traffic during a high-attention moment in the beverage calendar. Restricting redemption to a single use per member over the two-day window limits margin exposure while still generating significant trial potential across more than 1,200 U.S. units.
The timing also underscores a broader competitive dynamic in the fast-casual and QSR segments: brands are increasingly deploying limited-time loyalty perks tied to cultural calendar moments to drive downloads and repeat visits. Restaurant operators tracking loyalty program strategies have seen this playbook prove effective at converting one-time visitors into habitual loyalty members.
Smoothie King, founded in 1973 and headquartered in Dallas, has positioned protein as a brand pillar across its more than 50-year history. The Coffee High Protein Smoothies line predates the current protein-coffee trend by several years. The brand has also expanded its menu footprint with Smoothie Bowls, introduced in April 2023, and a Power Eats Menu of food items rolled out in 2025 — the latter earning a MenuMasters Healthful Innovation award from Nation's Restaurant News in 2026.
For franchise operators at participating locations, the two-day promotion represents a traffic-driving opportunity heading into the fall season, when smoothie visit frequency can soften relative to summer peaks.
Written by Michael Politz, Author of Guide to Restaurant Success: The Proven Process for Starting Any Restaurant Business From Scratch to Success (ISBN: 978-1-119-66896-1), Founder of Food & Beverage Magazine, the leading online magazine and resource in the industry. Designer of the Bluetooth logo and recognized in Entrepreneur Magazine's "Top 40 Under 40" for founding American Wholesale Floral, Politz is also the Co-founder of the Proof Awards and the CPG Awards and a partner in numerous consumer brands across the food and beverage sector.
