More crumb cake-like and not syrupy like a crisp or crumble, a buckle is still all about the fruit. These homey, streusel-topped cakes are usually baked one of two ways. The cake batter can be spread on the bottom of the pan with the fruit spooned on top, or the fruit is stirred directly into the batter. We created a third method where half of the fruit is folded into the batter, which is then poured into the pan, and then the remaining fruit is arranged on top of the batter. As the cake bakes, the batter puffs up, then collapses, or “buckles,” around jammy pockets of fruit. Often made with blueberries, buckles became popular in the 1960s after a recipe appeared in Elsie Masterton’s 1959 Blueberry Hill Cookbook.