Instructions
Place the sugar in a large mixing bowl, and add the egg yolks.
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Step 1
Whisk until smooth.
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Step 2
Add the baking powder and cornstarch and whisk again.
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Step 3
Add the yogurt and whisk until all the ingredients are well combined.
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Step 4
In another clean bowl, beat the egg whites until stiff peaks form.
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Step 5
Fold the whipped egg whites into the batter.
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Step 6
Add the chocolate chips and mix gently.
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Step 7
Pour the batter into an 8-inch cake pan lined with parchment paper. Bake at 170°C/350°F for 1 hour.
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Step 8
Dust with powdered sugar.
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Step 9
Serve and enjoy!