Can't find cannoli shells at your local supermarket and don't feel like baking your own? No problem. With this recipe, sugar cones replace the cannoli shells. They're widely available and taste almost like the real thing. And the filling is a snap to prepare. The secret is to make sure you let the ricotta cheese drain well. That's what makes the filling so creamy. Don't fill the ice cream cones in advance, or they could get soggy. But you can make the filling several hours or even up to a day in advance. Just cover and refrigerate. Right before serving, fill the shells.