As a food lover, I've always been curious about why butter chicken is the most famous Indian dish outside of India. After some research, I believe it's due to its rich and creamy taste that appeals to a wide range of palates. Additionally, the use of familiar ingredients like chicken and tomato sauce makes it more accessible to people who are new to Indian cuisine. The dish's beautiful presentation and vibrant colors also make it visually appealing, which adds to its popularity. Overall, butter chicken's delicious flavors, familiar ingredients, and stunning appearance make it a top choice for those wanting to explore Indian cuisine.