Preheat oven to 350 degrees; grease a 9 x 5 inch pan.

Mix together the flour, sugar, baking soda, and salt; set aside.

Whisk together the melted butter, eggs, sour cream and vanilla.

Mix the wet ingredients into the dry, however do not over mix!

Gently fold in the blackberries.

Pour into prepared pan.

Bake for 55-60 minutes; until a toothpick in the center comes out clean. Allow to cool in the pan for 10 minutes, remove and cool completely.

Slice, serve and enjoy!