Preheat oven to 300°F. Grease three 6×2 inch mini loaf pans.
In a large bowl, cream butter and sugar. Blend in eggs, mashed bananas, sour cream, vanilla and cinnamon until smooth. Mix in salt, baking soda, and flour. Stir in chopped mangoes. Stir in chopped pecans if using. Divide into prepared pans.
Bake for 25-30 minutes, until a toothpick inserted in center comes out clean.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.