Step 1: Prepare the Oven and Pan
Preheat your oven to 170°C (340°F). Line the bottom of a round cake pan with parchment paper.Step 2: Separate the Eggs
Carefully separate egg whites and yolks into two clean bowls.Step 3: Mix the Yolk Batter
Whisk the egg yolks with sugar until pale and creamy. Add yogurt, cornstarch, and baking powder. Mix until smooth.Step 4: Whip the Egg Whites
Add a pinch of salt to the egg whites and beat until stiff peaks form. The mixture should be glossy and hold its shape.Step 5: Fold the Mixture
Gently fold one-third of the whipped egg whites into the yolk mixture. Then fold in the remaining whites carefully using upward motions.Step 6: Bake
Pour the batter into the prepared pan and smooth the top lightly. Bake for 45–55 minutes until lightly golden and set in the center.Step 7: Cool and Serve
Let the cake cool gradually before removing from the pan. Dust with powdered sugar before serving.