Making Lemon Blueberry Cake is a straightforward process, and following these steps will ensure success:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease and flour two 9-inch round cake pans.
2. Prepare Dry Ingredients: In a medium bowl, sift together the flour, baking soda, baking powder, and salt.
3. Cream Butter and Sugar: In a separate large bowl, cream together the softened butter and granulated sugar until light and fluffy.
4. Add Eggs: Beat in the eggs, one at a time, until well combined.
5. Mix in Flavors: Stir in the lemon zest, lemon juice, and vanilla extract until fully mixed.
6. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
7. Fold in Blueberries: Gently fold in the blueberries, being careful not to overmix or break them.
8. Pour Batter into Pans: Divide the batter evenly between the prepared cake pans.
9. Bake: Bake in the preheated oven for 30-35 minutes or until a toothpick inserted into the center comes out clean.
10. Cool Down: Allow the cakes to cool in the pans for about 15-20 minutes, then gently transfer them to wire racks to cool completely.
11. Make Optional Glaze: In a small bowl, whisk together the powdered sugar and lemon juice for a glaze, if desired.
12. Assemble the Cake: Once the cake layers are completely cool, place one layer on a serving plate. If using glaze, drizzle it over the first layer before adding the second layer on top.
13. Serve the Cake: You can glaze the top layer as well for an extra touch of sweetness!

By following these steps, you will create a luscious Lemon Blueberry Cake that everyone will adore!