All cobbler fillings contain either fresh, frozen, or canned peaches. Where these different dessert recipes differ is the crust or topping. For cobblers, the crust is on top, and it's usually made with butter, milk, sugar, and flour. However, some variations call for cake mixes, cookie dough, pie crusts, biscuits, and even Bisquick. The only difference between a crisp and a cobbler is how the topping is made. With a crisp, oats are mixed with flour and butter and sprinkled over the filling to produce a crispy crust. For a pie, a pie crust is used and is found on the bottom, then the filling, and sometimes a top crust or lattice crust is added.