Preheat oven to 350* F. Prepare an 8 ½-inch by 4 ½-inch loaf pan by greasing it and lining it with parchment paper.
In a medium bowl, combine flour, baking powder, baking soda, and salt. Stir to combine and set aside.
2 Cups All-Purpose Flour, 1 ¼ teaspoon Baking Powder, ½ teaspoon Baking Soda, ½ teaspoon Kosher Salt
In a large bowl, combine mashed overripe banana, sugar, non-dairy milk, canola oil, vanilla, and vinegar. Stir to combine, then add the dry ingredients and stir to form the batter. See note!
1 ¼ Cups Mashed Overripe Banana, ½ Cup Granulated Sugar, ½ Cup Non-Dairy Milk, ⅓ Cup Canola Oil, 2 teaspoon Vanilla Extract, 1 teaspoon White Vinegar
Add chopped blackberries and fold them into the batter until they are distributed.
1 Cup Fresh Blackberries, roughly chopped
Scrape the batter into a prepared loaf pan and use the back of the spatula to spread it out evenly. Then, sprinkle the top of the loaf with granulated sugar.
1 ½ teaspoon Granulated Sugar
Bake the blackberry banana bread in a 350*F oven for 57-65 minutes or until a toothpick inserted into the center of the loaf comes out clean.
Allow the loaf to cool for at least 30 minutes before slicing and serving.