Preheat your oven to 180°C (350°F). Line a 20cm (8-inch) round cake pan with parchment paper and set it aside.
In a large mixing bowl, whisk together the Greek yogurt and superfine sugar until the mixture is smooth, slightly fluffy, and fragrant.
Add the eggs one at a time, whisking well after each addition. The batter should become lighter in color and slightly frothy.
Stir in the neutral oil and lemon zest, mixing until evenly combined and the batter feels smooth and slightly shiny.
Sift the all-purpose flour and baking powder into the bowl to prevent lumps. Gently fold the dry ingredients into the wet mixture until just combined, being careful not to overmix.
Pour the batter into your prepared cake pan, smoothing the top with a spatula to ensure an even surface.
Bake for 30-35 minutes, until the cake turns golden, develops a few cracks on top, and a toothpick inserted in the center comes out clean. The edges may slightly pull away from the pan.
Remove the cake from the oven and let it cool in the pan for about 10 minutes, allowing the structure to set. Then, transfer it to a wire rack to cool completely.
Once cooled, slice and serve the cake plain, or dust with powdered sugar for extra sweetness. Enjoy its light, tangy flavor and moist crumb as a perfect casual treat.