Date-Nut Apple Cake

Ingredients (13)

• 1 package (8 ounces) chopped dates
• 1 cup raisins
• 2-1/2 cups all-purpose flour, divided
• 1/2 cup butter, softened
• 2 cups sugar
• 2 eggs
• 1 teaspoon vanilla extract
• 2 teaspoons baking soda
• 1 teaspoon salt
• 1-3/4 cups boiling water
• 1 cup chopped peeled tart apple
• 1 cup chopped walnuts
• Confectioners' sugar, optional