Most cheesecakes are baked slowly using a water bath to ensure the cake doesn't dry out, crack, or overcook, but the Basque cheesecake does the opposite.
Basque cheesecake is baked on high heat (400°F to 450°F) with no water bath. Your goal is essentially to burn the outside and slightly undercook the inside.
This cooking method gives the Basque cheesecake a more nutty, unique depth of flavor and a gooey, creamy interior that's more like a crème brûlée in texture than a cheesecake.
Where a classic cheesecake is smooth, uniform, and light in color, Basque cheesecake is wrinkly, rough around the edges, and caramelized to a deep, dark, brown.