Banana/Peach/Blueberry Muffins

I found this recipe for Mel's Banana Muffins in the Food Network Magazine but I only had one banana, so I used a peach (peeled and mashed) as a substitute for the second one, and the muffins taste great!

Ingredients

1 cup whole-wheat flour
3/4 cup all-purpose flour
1/4 cup wheat germ
1 teaspoon baking soda
Salt
1/2 cup (1 stick) unsalted butter, at room temperature
1/3 cup granulated sugar
1/3 cup firmly packed light brown sugar
2 large eggs
3/4 cup mashed bananas (about 2 medium)
1/3 cup 2 percent milk
1 teaspoon vanilla extract
1 cup blueberries

Directions

Preheat the oven to 375 degrees F. Line a 12-cup muffin pan with paper liners and set aside. In a medium bowl, whisk together the flours, wheat germ, baking soda and 1/2 teaspoon salt.

Using an electric mixer, beat the butter and sugars together in a separate bowl until light and fluffy, about 5 minutes. Add the eggs, one at a time, beating well after each addition. In a separate bowl, combine the mashed bananas with the milk and vanilla. With the mixer on low, alternately add one-third of the flour mixture and half of the banana mixture to the butter mixture, beginning and ending with the flour mixture. Mix until just combined. Fold in the blueberries.

Divide the batter among the muffin cups. Bake 20 to 24 minutes, or until a toothpick inserted into the center of a muffin comes out clean