I've made these twice now and they are hard to resist any time of the day. Personally I think this is another good example of how a muffin can be better than a cupcake. The first time I made them I didn't have whole-wheat flour so I used all-purpose and, admittedly, they're better with the all-purpose and I think plenty "healthy" enough.
1 cup whole-wheat flour (spooned and leveled)
3/4 cup all-purpose flour (spooned and leveled)
1/4 cup wheat germ
1 teaspoon baking soda
1/2 teaspoon salt
1/2 cup (1 stick) unsalted butter, room temperature
1/3 cup granulated sugar
1/3 cup packed light-brown sugar
2 large eggs
2 ripe bananas (about 1 pound)
1/3 cup reduced-fat (2 percent) milk
1 teaspoon pure vanilla extract
1 cup frozen blueberries
1. Preheat oven to 375 degrees. Line a 12-cup muffin pan with paper liners. In a bowl, whisk together flours, wheat germ, baking soda, and salt.
2. In a large bowl, beat butter and sugars with a mixer until light and fluffy. Add eggs, one at a time, beating well after each addition. In another bowl, mash bananas with a fork (you should have 3/4 cup); stir in milk and vanilla.
3. With mixer on low, alternately add flour mixture and banana mixture to butter mixture, beginning and ending with flour mixture; mix just until combined. Fold in frozen blueberries.
4. Divide batter among muffin cups. Bake until a toothpick inserted in the center of a muffin comes out clean, 25 to 28 minutes, rotating pan halfway through. Let cool in pan 10 minutes; transfer muffins to a rack to cool 10 minutes more.
From Everyday Foods