In a bowl, whisk together the flour, sugar, brown sugar, salt, cinnamon, and baking soda.

In another large bowl, whisk the egg, mashed banana, olive oil, sour cream, and vanilla to combine.

Add the flour mixture into the banana mixture using a whisk to stir until just combined being careful not to over-mix.

Spray a 9X5 loaf pan with cooking spray; it also helps to line it with parchment and spray it (I don’t always do this but it’s a safe way to make sure the loaf comes out of the pan easily).

Pour the batter into the prepared loaf pan.

Bake at 325 degrees for 60-90 minutes or until a toothpick comes out clean.

Allow the loaf to cool for about 15-20 minutes and then remove from the pan to cool on a cooling rack.