Preheat your oven to 375°F (190°C) and lightly grease a 10-inch (25 cm) cake pan.
In a medium-sized bowl mix together the salt and baking powder. Use a flour sieve to add the flour and mix well.
2 cups of cake flour, 1/4 teaspoon of salt, 2 teaspoons of baking powder
In a separate bowl, whisk the sugar, and eggs for 4 minutes. (if using a hand mixer, be sure to use the low setting).
1 cup of granulated sugar, 3 large eggs
Next, gently fold in the Greek yogurt and once combined evenly, slowly add the olive oil while mixing constantly.
1 cup Greek yogurt, 2/3 cup of Spanish extra virgin olive oil
Fold in the flour mixture using a spatula, add the apple chunks and a pinch of ground cinnamon then gently fold in until all ingredients are combined.
1 large apple, Pinch of ground cinnamon
Pour the cake batter into the greased and floured cake pan.