Semi-healthy Banana Bread

I tried to make a banana bread with a little less fat and sugar, and a little more fiber. Banana bread should form a crack down the center as it bakes--a sign the baking soda is doing its job.

Ingredients

1 cup all-purpose flour
1 cup whole wheat flour
3/4 teaspoon baking soda
1/2 teaspoon salt, rounded
2/3 cup sugar
1/4 cup unsalted butter, softened
2 large eggs
1 1/2 cups mashed ripe banana (about 3 bananas)
1/3 cup plain low-fat yogurt
1/3 cup no sugar added applesauce
1 teaspoon vanilla extract
Cooking spray

Directions:
Preheat oven to 350°.
Lightly spoon flour into dry measuring cups; level with a knife. Combine the flours, baking soda, and salt, stirring with a whisk.
Place sugar and butter in a large bowl, and beat with a mixer at medium speed until well blended (about 1 minute). Add the eggs, 1 at a time, beating well after each addition. Add banana, yogurt, applesauce and vanilla; beat until blended. Add flour mixture; beat at low speed just until moist. Spoon batter into an 8 1/2 x 4 1/2-inch loaf pan coated with cooking spray. Bake at 350° for 1 hour or until a wooden pick inserted in center comes out clean. Cool 10 minutes in pan on a wire rack; remove from pan. Cool completely on wire rack.