Step 1

Preheat oven to 350°. Generously grease a 9"x 5" loaf pan.

Step 2

Whisk together flour, baking soda, and salt. Set aside.

Step 3

Using an electric mixer on medium speed, beat butter and sugar until light and fluffy. Add eggs, one at a time, mixing well after each addition. Add bananas, sour cream, and vanilla, and continue beating until combined.

Step 4

Gradually add flour mixture, mixing just until combined. Stir in chocolate.

Step 5

Transfer batter to prepared pan. Bake 50-60 minutes, or until a pick inserted into the center comes out clean.

Step 6

Cool in pan for about 10 minutes. Then, transfer bread to wire rack to cool completely.