Preheat your oven to 350°F (175°C). Grease and flour a 9-inch round cake pan or an 8×8-inch square pan.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
In a large bowl, whisk together the sugar, melted butter, eggs, Greek yoghurt, and vanilla extract until well combined.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Don’t overmix.
Gently fold in the blueberries.
Pour the batter into the prepared pan. Bake for 35-45 minutes, or until a toothpick inserted into the center comes out clean.
Let the cake cool in the pan for about 10 minutes before inverting it onto a wire rack to cool completely.