Creating the Lemon Blueberry Layer Cake can be straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour three 8-inch round cake pans.
2. Mix the Dry Ingredients: In a large bowl, sift together the flour, baking powder, and salt.
3. Cream the Butter and Sugar: In another bowl, beat the softened butter and granulated sugar until light and fluffy.
4. Add the Eggs: Add the eggs one at a time to the butter mixture, beating well after each addition.
5. Incorporate the Milk and Lemon: Mix in the milk, lemon zest, and lemon juice until combined.
6. Add the Dry Ingredients: Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
7. Fold in Blueberries: Gently fold in the fresh blueberries to the batter, being careful not to break them.
8. Divide the Batter: Pour the batter evenly into the prepared cake pans.
9. Bake: Place in the oven and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.
10. Cool the Cakes: Remove from the oven and allow the cakes to cool in the pans for about 10 minutes. Then, transfer them to wire racks to cool completely.
11. Make the Frosting: In a large bowl, beat the softened butter until creamy. Gradually add the powdered sugar, lemon juice, and lemon zest, mixing until smooth. Add milk as needed to achieve the desired consistency.
12. Assemble the Cake: Once the cakes are completely cool, place one layer on a serving platter. Spread a layer of frosting on top, then add the second layer and repeat. Top with the final layer and frost the top and sides of the entire cake.
13. Decorate: Garnish the top of the cake with additional fresh blueberries and lemon zest for a beautiful finish.

These steps will guide you in effortlessly creating this incredible Lemon Blueberry Layer Cake.