Creating the Pistachio and Blackberry Olive Oil Cake is simple if you follow these clear steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour an 8-inch round cake pan.
2. Mix Dry Ingredients: In a medium bowl, combine the flour, baking powder, salt, and chopped pistachios. Mix well and set aside.
3. Combine Wet Ingredients: In a large bowl, whisk together the eggs, granulated sugar, olive oil, milk, and vanilla extract until smooth and well combined.
4. Combine Mixtures: Gradually add the dry ingredients to the wet mixture, stirring until just combined. Be careful not to overmix.
5. Fold in Blackberries: Gently fold in the fresh blackberries, being cautious not to break them apart too much.
6. Pour Batter: Pour the batter into the prepared cake pan, smoothing the top with a spatula.
7. Bake: Place the cake in the preheated oven and bake for 35-40 minutes or until a toothpick inserted in the center comes out clean.
8. Cool: Once baked, remove the cake from the oven and allow it to cool in the pan for about 15 minutes. Carefully transfer it to a wire rack to cool completely.
9. Dust with Powdered Sugar: Before serving, dust the top of the cake with powdered sugar for an elegant finish.

These steps will guide you in creating this incredible cake effortlessly.