Preheat oven to 350 F (180 C) and prepare deep round bundt pan.
In a medium bowl, hand whisk all dry ingredients together.
In bowl of stand mixer with whisk attachment, mix all wet ingredients until smooth.
Slowly spoon flour mixture into wet mixture and continue on medium high until batter is formed. Scrape sides and bottom of bowl once during mixing.
Pour cake batter into pan and bake fro 30-35 minutes or until toothpick inserted into center comes out clean.
Remove pan from oven and cool on rack for 15 minutes.
Flip cake pan upside down onto serving dish, allowing cake to drop from pan. Top with blackberries and a dusting of powdered sugar.
Glaze if desired and serve with fresh blackberries! (see tips above.)