Starbucks Corporation (SBUX) shares plummeted 5.04% in after-hours trading on Tuesday following the release of its fiscal second-quarter earnings that fell short of analyst expectations. The coffee giant reported weaker-than-anticipated comparable store sales and earnings per share, indicating challenges in its turnaround efforts amid a tough consumer environment.

For the quarter ended March 30, Starbucks posted adjusted earnings per share of $0.41, missing the analyst consensus estimate of $0.49. Revenue came in at $8.76 billion, slightly below the expected $8.83 billion. Global comparable store sales declined 1%, driven by a 2% drop in comparable transactions, partially offset by a 1% increase in average ticket. This marks the fifth consecutive quarter of declining same-store sales for the company.

The disappointing results reflect ongoing challenges for Starbucks, including weakened consumer demand in key markets and the impact of recent trade tensions. In North America, comparable store sales fell 1%, while U.S. comparable store sales declined 2%. The international segment saw a 2% increase in comparable store sales, with China's performance remaining flat.

Despite the underwhelming financial results, Starbucks CEO Brian Niccol expressed confidence in the company's "Back to Starbucks" turnaround strategy. "My optimism has turned into confidence that our 'Back to Starbucks' plan is the right strategy to turn the business around and to unlock opportunities ahead," Niccol stated. He added that while financial results do not yet reflect the progress made, the company is seeing "real momentum" with its initiatives.

Starbucks is implementing various measures to improve its performance, including simplifying its menu, enhancing order processing, and creating a warmer atmosphere in its stores. The company is also testing new technologies to reduce wait times and improve customer experience. However, these efforts are yet to translate into improved financial performance, as evidenced by the latest quarterly results.