Ingredients:* 1 and a half cups of all-purpose flour.* 3/4 cup of plain yogurt.* 1 cup of white granulated sugar.* Lemon zest from 1 whole lemon.* 2 eggs at room temperature.* 1/2 cup of vegetable oil.* 1 tsp of vanilla essence (optional).* 1 tsp of baking powder and 1/2 tsp of baking soda.* 1/2 tsp of salt.