Mixed Berry Shortcake Trifle

Name: Mixed Berry Shortcake Trifle
Ingredients: 3 cups plus 1 1/2 tablespoons all-purpose flour, divided, plus more for surface; 1 cup plus 2 tablespoons granulated sugar, divided; 1 tablespoon plus 1 1/2 teaspoons baking powder; 1 1/4 teaspoons kosher salt; 3/4 teaspoon ground cinnamon; 12 tablespoons (1 1/2 sticks) cold unsalted butter; 4 1/2 cups cold heavy cream, divided; 2 pounds frozen mixed berries (about 7 1/2 cups); 2 (about 8-ounce) packages cold mascarpone cheese (2 cups); 1 1/2 teaspoon vanilla extract; 1 pound fresh strawberries; 10 ounces fresh blueberries (1 pint)