Can you tell me about the time Sai Baba fulfilled a devotee's desire for a specific sweet?

Yes, Chapter 28 of the Shri Sai Satcharitra details a wonderful leela involving a devotee named Laxmichand. While visiting Shirdi, Laxmichand developed a strong desire for khaja, a sweet he had tasted as prasad. His wish remained unfulfilled for a day. Then, in a display of His omniscience, Baba Himself instructed the devotees to bring "a plate full of khaja" as naivedya. Later, He announced His own desire to have khaja prasad, ensuring that Laxmichand's craving was satisfied. This incident, as described in Chapter 28, beautifully illustrates how Baba knew and fulfilled even the smallest, unspoken desires of His devotees, solidifying their faith and love for Him.