Baking Tips?

I have to make dessert for somebody who is not allowed to eat any processed foods (white flour, white sugar etc.) or trans fats (margarine/butter). I have no problem leaving out the margarine, but I have very little experience baking with whole wheat flour. I know it makes things a bit denser and drier and there is nothing worse than a dry cake/cookie, so if anyone has any tips to avoid that, please share. And if anybody has any recipes they would like to share, that would be spectacular :-) While searching for different recipes online, I found this great cookie recipe (below) from whole foods. I tried it out and it was a big hit.

Carrot Walnut Cookies

Ingredients:

• 1 C raw unsalted walnuts
• 1 C rolled oats
• 1 C raisins
• 1/2 C whole wheat flour
• 1 1/4 tsp baking powder
• 1 1/4 tsp ground cinnamon
• 1/2 tsp ground ginger
• 2 carrots, grated
• 1 apple, grated
• 1 very ripe banana
• 1/4 C apple juice

Preheat oven to 350 F. Line Baking sheets with parchment paper. Combine walnuts, oats and raisins in a food processor and pulse until finely ground. Transfer to a bowl and stir in flour, baking powder, cinnamon, and ginger. Add carrots, apple, banana and apple juice and stir until combined. Drop by rounded tablespoons an inch apart on the baking sheets, making about 24 cookies. Press down with the back of fork to flatten slightly. Bake until tops and bottoms are lightly browned, 20-25 minutes.