Part 3/8:
Gently mix in 2 tablespoons of vegetable oil, 1 teaspoon of vanilla extract, and 1/3 cup of plain yogurt until just combined.
- Sift and Fold:
Sift together 3/4 cup plain flour, 1/2 teaspoon baking powder, and 1/4 teaspoon salt over the batter. Fold the dry ingredients into the wet mixture gently to preserve the air created by the whipped egg whites.
- Prepare Chocolate Mixture:
Set aside 1/3 cup of the batter into a separate bowl. Sift 2 teaspoons of unsweetened cocoa powder over this batter and fold gently until just combined.
Baking the Cake
- Prepare Baking Pan: