Make pancake batter: Add the yogurt, eggs, vanilla extract, sugar, melted and cooled butter, salt, and baking powder to a large bowl. Whisk together until combined.
1 cup (240g) plain yogurt, 2 large eggs, 1 teaspoon vanilla extract, 2 tablespoons sugar, 1 tablespoon melted butter, 1/4 teaspoon salt, 1 1/2 teaspoons baking powder
Slowly add the flour, whisking constantly until just combined. (but don't overmix the batter). Set aside.
1 cup (125g) flour
Prepare the apples: Peel the apples and remove the core (you can use an apple core cutter or a sharp thin knife). Cut into 1/3 inch (5-7 mm) slices, set aside. Do not cut thicker slices or the apples won't come out soft.
4 small apples (20oz/570g), soft variety
Cook pancakes: Heat clarified butter or oil in a frying pan (preferably non-stick), over medium heat.
Dunk each apple ring in the batter. Place apple rings in the pan. If there is too much batter in the middle of the pancakes (where the hole is), take some out with a small spoon - it will be easier to cook the pancakes and they won't be raw in the middle. Cook over medium heat until browned on one side then turn over and cook until golden and cooked through. They should not feel too soft in the middle (indication there is raw batter in the middle). Transfer to a plate and repeat with the remaining apples.
Sprinkle with powdered sugar (the pancakes should be slightly cooled) or with vanilla or cinnamon sugar (the pancakes should be warm).
Enjoy!