If you have more time, visit the Sri Chamundeshwari Temple or St. Philomena's Church for a spiritual experience.
For a culinary delight, try the local Mysore Pak sweet and the Mysore Masala Dosa at Hotel RRR or Mylari Hotel.
If you have less time, skip Brindavan Gardens as it closes by 7 PM and enjoy the night view of Mysore Palace, which remains open till 9 PM.