Preheat oven to 350 degrees F. Line a 9x9x2-inch baking pan with foil, extending foil over the edges of the pan. Lightly coat foil with nonstick cooking spray. Set aside.
In a medium bowl, combine all-purpose flour, whole wheat flour, sugar, pumpkin pie spice, baking powder, and salt.
Add shredded carrot, 1/2 cup of the nuts, the eggs, oil, and milk
Stir just until combined. Spread mixture evenly in the prepared pan.
Bake for 15 to 18 minutes or until a toothpick inserted near center comes out clean. Cool bars in pan on a wire rack.
Using the edges of the foil, lift the uncut bars out of the pan.
Spread top evenly with Fluffy Cream Cheese Frosting. Sprinkle with the remaining 1/4 cup nuts. Cut into 20 bars.
Fluffy Cream Cheese Frosting
In a medium bowl, beat cream cheese with an electric mixer on medium speed until smooth.
Beat in yogurt until smooth. Fold thawed whipped topping into cream cheese mixture.
Recipe Notes
Source: Better Homes and Gardens Diabetic Living Online