This apple cinnamon yogurt cake is a light and tangy dessert that's perfect for summer. It's a moist and fluffy cake with a subtle apple and cinnamon flavor. To make this cake, you'll need all-purpose flour, baking powder, salt, sugar, eggs, plain yogurt, vegetable oil, vanilla extract, apples, and cinnamon. Mix the dry ingredients in one bowl and the wet ingredients in another. Combine the two mixtures and fold in the chopped apples. Pour the batter into a greased baking pan and bake for 35-40 minutes or until a toothpick inserted in the center comes out clean. Let the cake cool before slicing and serving. You can also top it with a dollop of yogurt and fresh fruit.