Sweet Potato Bread

Name: Sweet Potato Bread
Ingredients: 1 cup all-purpose flour, plus more for dusting the pan; ½ cup whole wheat pastry flour; 1 teaspoon fine salt; 1 teaspoon baking soda; ½ teaspoon baking powder; ½ teaspoon ground cinnamon; ½ teaspoon mace (or freshly ground nutmeg); 1 cup sweet potato flesh, scooped from 1-2 roasted sweet potatoes (instructions follow); ⅔ cup granulated sugar; ⅓ cup packed light brown sugar; 8 tablespoons unsalted butter (1 stick), melted, plus more for coating the pan; 2 large eggs, at room temperature; 1 teaspoon vanilla extract; scant ½ cup whole milk