The Third Wave Coffee Roasters in Indiranagar sports a bright pink sign under the awning, saying Third Rush desserts. 

It ushers people in to try the Bengaluru-based specialty coffee chain’s latest offering—Jim Jam tres leches, pineapple cake, and some 200-odd dessert options. Similar signs decorate the Third Wave outlets in Koramangala, Sadashivnagar, and Vijaya Bank Layout, with plans to expand to around 50 cafes by the end of the year.

This is the latest in what has been a series of experiments and reinventions for the chain. First, it wanted to........

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