To substitute fresh cherries for frozen, you will need about 3 1/4 pounds whole cherries. Once pitted, you should have 3 pounds of cherries. Reduce the cornstarch in the ingredient list to 3 tablespoons, then follow the directions as written. When measuring flour, we spoon it into a dry measuring cup and level off excess. (Scooping directly from the bag compacts the flour, resulting in dry baked goods.)