Pistachio Rosewater Hamantaschen

Name: Pistachio Rosewater Hamantaschen
Cuisine: Asian, Indian
Ingredients: 2 cups (250 grams) all-purpose flour, plus more for rolling; 0.25 cups (50 grams) granulated sugar; 0.5 teaspoons (2 grams) baking powder; 0.5 teaspoons ground cardamom; 0.5 teaspoons (2 grams) kosher salt; 8 tablespoons (113 grams/1 stick) unsalted butter, at room temperature; 0.33 cups (85 grams) mascarpone; 1 large egg yolk, at room temperature; 1 teaspoon finely grated orange zest; Whole milk, for brushing the dough; 1 cup (130 grams) dry roasted, unsalted shelled pistachios; 0.5 cups (65 grams) confectioners’ sugar; Finely grated zest of 1 orange; 0.25 teaspoons ground cardamom; 2 teaspoons (8 grams) rosewater; 1.5 teaspoons water