Creating Lemon Blackberry Cake is straightforward. Follow these easy steps for the best results:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. Mix Dry Ingredients: In a medium bowl, sift together the flour, baking powder, baking soda, and salt.
3. Cream Butter and Sugar: In a larger bowl, beat the softened butter and granulated sugar until light and fluffy.
4. Add Eggs: Add the eggs one at a time, mixing well after each addition.
5. Incorporate Buttermilk: Gradually mix in the buttermilk, lemon zest, and fresh lemon juice until fully combined.
6. Combine Mixtures: Slowly add the dry ingredients to the wet mixture, stirring gently until just combined. Do not overmix.
7. Add Blackberries: Gently fold in the fresh blackberries, being careful not to crush them too much.
8. Divide Batter: Pour the batter equally into the prepared cake pans.
9. Bake: Place the pans in the oven and bake for 35-40 minutes or until a toothpick inserted in the center comes out clean.
10. Cool: Remove the cakes from the oven and let them cool in their pans for about 20-30 minutes. After cooling, transfer to wire racks to cool completely.
11. Frost (Optional): Once cooled, frost with your favorite lemon frosting or whipped cream if desired. Dust with powdered sugar for a final touch before serving.

These straightforward steps will guide you through the process of creating this delightful cake, ensuring satisfaction with every slice.