Making your Lemon Blueberry Cake is straightforward if you follow these simple steps:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.

2. Prepare the Blueberries: If using fresh blueberries, rinse and dry them thoroughly. Toss with a bit of flour to prevent sinking.

3. Combine Dry Ingredients: In a bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.

4. Cream the Butter and Sugar: In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy.

5. Add Eggs: Beat in the eggs, one at a time, making sure to incorporate well after each addition.

6. Add the Yogurt and Lemon: Stir in the sour cream (or yogurt), lemon zest, and lemon juice. Mix until smooth.

7. Combine Wet and Dry Mixtures: Gradually add the dry mixture to the wet ingredients, mixing until just combined. Avoid overmixing for a tender cake.

8. Fold in Blueberries: Gently fold the floured blueberries into the batter with a spatula. This helps keep them intact.

9. Divide and Pour: Divide the batter evenly between the prepared cake pans.

10. Bake: Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted in the center comes out clean.

11. Cool: Allow the cakes to cool in the pans for 10 minutes. Then transfer them to wire racks to cool completely.

12. Prepare Lemon Glaze (Optional): Mix powdered sugar with lemon juice to taste for a simple glaze while the cake cools.

13. Assemble the Cake: Once the cakes are completely cool, place one layer on a serving platter. Top with lemon glaze or whipped cream, if desired.

14. Top with the Second Layer: Add the second layer on top and finish with more glaze or powdered sugar for a beautiful effect.

Following these steps will enable you to create a delicious Lemon Blueberry Cake that wows everyone at your gathering!