For the cake:
1 cup (236.5 mL) all-purpose flour
1 cup (236.5 mL) whole wheat pastry flour
1 ½ teaspoons (7.4 ml) baking powder
1 ½ teaspoons (7.4 ml) baking soda
1 ½ teaspoons (7.4 ml) ground cinnamon
½ teaspoon (2.5 ml) apple pie spice
½ teaspoon (2.5 ml) salt
¾ cup (177.4 mL) Splenda® Granulated Sweetener
½ cup (118.3 mL) canola oil
½ cup (118.3 mL) 1% lowfat milk
1 large egg, lightly beaten
1 tablespoon (14.8 mL) apple juice or apple cider
1 teaspoon (4.9 ml) vanilla extract
1 ½ cups (354.8 mL) chopped apple
½ cup (118.3 mL) chopped walnuts
For the topping:
1 cup (236.5 mL) whole wheat pastry flour
½ cup (118.3 mL) Splenda® Granulated Sweetener
1 teaspoon (4.9 ml) ground cinnamon
½ teaspoon (2.5 ml) baking powder
¼ cup (59.1 mL) canola oil
¼ cup (59.1 mL) chopped walnuts