Sure, here's an ideal itinerary for one day in Bengaluru:

Morning: Start your day with a visit to the Lalbagh Botanical Garden, one of the most popular tourist attractions in Bengaluru. The garden is spread over 240 acres and is home to a variety of flora and fauna. You can take a leisurely stroll through the garden, enjoy the fresh air and take in the beautiful surroundings.

Afternoon: After spending the morning at Lalbagh, head to the nearby MTR restaurant for a traditional South Indian lunch. MTR is a popular restaurant chain in Bengaluru and is known for its delicious food. Try the masala dosa, idli, vada or any other South Indian delicacy.

Evening: In the evening, visit the Bangalore Palace, a beautiful palace built in the Tudor style of architecture. The palace is spread over 450 acres and is a popular tourist attraction in Bengaluru. You can take a guided tour of the palace and learn about its history and architecture.

Night: End your day with a visit to the UB City Mall, one of the most luxurious malls in Bengaluru. The mall is home to a variety of high-end brands, restaurants and cafes. You can enjoy a delicious dinner at one of the restaurants and then head to the rooftop bar for a drink and a stunning view of the city.

This itinerary will give you a taste of the best that Bengaluru has to offer in just one day.