All three are made with a sweet fruit filling and baked with a topping. Crumble and crisp are very similar, both are made with butter, sugar, and flour. Crisps traditionally have oats and/or nuts in the mix, whereas crumbles don't. But I love to include them too in a crumble streusel. A cobbler fruit filling is topped with pieces of pie crust or American biscuit dough.