Baking with Dorie: A Cobbler to Coo Over Recipe

Name: Baking with Dorie: A Cobbler to Coo Over Recipe
Ingredients: For the crust:; 2 cups all-purpose flour; 1 tablespoon double-acting baking powder; 3 tablespoons sugar; 1/2 teaspoon salt; 3/4 stick (6 tablespoons; 3 ounces) cold unsalted butter, cut into bits; 3/4 cup cold heavy cream; For the fruit filling:; 4 peaches, peeled, pitted and cut into small cubes; 2 cups blueberries; 3 to 5 tablespoons sugar (taste and decide how much you want); 1 tablespoon cornstarch; Grated zest of 1 lemon; 6 leaves lemon verbena, finely shredded (optional); 6 leaves lemon balm, finely shredded (optional); 1 tablespoon heavy cream, to brush the crust (optional); Decorating sugar or raw sugar, to dust the crust (optional); Vanilla ice cream, for serving