Preheat oven to 350 degrees F. Coat a 1 1/2- to 2-quart baking dish with cooking spray. Whisk whole-wheat flour, all-purpose flour, sugar (or Splenda Sugar Blend), cocoa, baking powder and salt in a large bowl. Whisk egg, milk, oil and vanilla in a glass measuring cup. Add to the flour mixture; stir with a rubber spatula until just combined. Fold in chocolate chips, if using. Scrape the batter into the prepared baking dish. Mix hot coffee and brown sugar (or Splenda Granular) in the measuring cup and pour over the batter. Sprinkle with nuts. (It may look strange at this point, but don't worry. During baking, cake forms on top with sauce underneath.)

Bake the pudding cake until the top springs back when touched lightly, 30 to 35 minutes. Let cool for at least 10 minutes. Dust with confectioners' sugar and serve hot or warm

Ingredient Notes: Whole-wheat pastry flour--the whole-grain equivalent of cake flour--adds fiber and a rich, nutty taste.

Substituting with Splenda: In the EatingWell Test Kitchen, sucralose is the only alternative sweetener we test with when we feel the option is appropriate. For nonbaking recipes, we use Splenda Granular (boxed, not in a packet). For baking, we use Splenda Sugar Blend for Baking, a mix of sugar and sucralose. It can be substituted in recipes (1/2 cup of the blend for each 1 cup of sugar) to reduce sugar calories by half while maintaining some of the baking properties of sugar. If you make a similar blend with half sugar and half Splenda Granular, substitute this homemade mixture cup for cup.

When choosing any low- or no-calorie sweetener, be sure to check the label to make sure it is suitable for your intended use.