If your Berry Crisp comes out of the oven a little too watery, more than likely you didn’t add enough cornstarch or it wasn’t baked for long enough. The best way to keep your crumb topping from getting soggy is to add cornstarch to the berry mixture and make sure the berries are bubbling before pulling it from the oven. Not only does the baking process cook out some of the water, it also helps to activate some of the natural pectins in the fruit. This all helps absorb some of the extra moisture, allowing the topping to stay nice and crisp.