Highly recommend this place. Bilbao is known for Bollos de mantequilla, or rolls of butter. It's…read morebeen famous since the early 1800s. It's a sweet brioche with sugar sprinkled on it that's cut in half and filled with a sweet cream made of butter and eggs. So soft and sweet. Service was excellent! It's a beautiful shop! There was a line, and I didn't know what to get, and the nice lady told me that this is famous in Bilbao. 2.30 euros for one delicious ball. I wish I had gotten more!