Preheat the oven to 210°C and prepare 5 oven-safe ramekins, each with a diameter of 9 cm. Place the ramekins in the oven for a few minutes to heat up.
Meanwhile, blend the eggs, milk, flour, sugar, and a pinch of salt in a blender. The batter should be smooth and fairly runny.
Peel the apple and grate it using the coarse side of a grater.
Carefully remove the hot ramekins from the oven (be cautious, they’ll be very hot!). Melt a small piece of butter (about 1/2 teaspoon) in each ramekin. Once the butter has melted, pour the batter into the ramekins and spread the grated apple on top.
Place the ramekins back in the oven and bake for 12-15 minutes until the pancakes are golden and puffed. Serve dusted with powdered sugar or your favourite toppings. Enjoy!