The best way to do this is by adding flavor, as cherries can offer you something sweeter. u003cbr/u003eu003cbr/u003eStill, they can be overwhelming if they don't have anything to contrast with, so getting the most out of flavored extracts and using spices are the most effective ways of doing this.u003cbr/u003eu003cbr/u003eWith some of these, you can mix into the cherries or sprinkle some on near the end of the cooking process, and if you find your filling is too runny, you can use some cornstarch, and whether you bake or refrigerate it, the filling should thicken as you want it to.