So you’ve got a couple of pounds of peaches ripening on the counter, several pints of blueberries and the promise of apples in a couple of months. You’re thinking pie.
You’ll probably want to thicken the juices that fruits release during baking.
Most recipes will specify a thickener. If you don’t have the thickener called for or if you plan to create your own dessert, here’s a general guideline: If 1 tablespoon all-purpose flour is used as thickener, you can substitute 1/2 tablespoon cornstarch (or potato starch or rice starch or arrowroot starch) or 1 tablespoon quick-cooking tapioca.
And while Fine Cooking magazine’s Carolyn Weil knows some cooks like to use flour to thicken a fruit pie, “I find the texture can be a bit gritty and that the flour turns the juices slightly cloudy,” she writes in “How to Break an Egg.”
“Both set clear when fully cooked and cooled. Using all cornstarch would make the filling gummy and all tapioca would make it seem dry,” she writes.
Almost as important as choosing a thickener, of course, is judging a fruit’s juiciness before you begin baking. Generally the riper the fruit, the more juice it will produce during baking, especially stone fruits (peaches, plums, nectarines). Strawberries, raspberries and blackberries are much more delicate (and juicier) than blueberries or cherries. And baking apples — well that’s another story.