Sift flour and salt into a medium-sized mixing bowl.

Create a well in the center of the dry ingredients.

Add egg yolks and cooking oil to the well.

Slowly mix the eggs and oil into the flour using a wooden spoon.

Gradually add milk while mixing.

Beat the batter well until smooth.

Cover the batter and refrigerate for 30 minutes.

Peel and core the cooking apples.

Cut the apples into small pieces or slices.

Toss the apple pieces with lemon juice to prevent browning.

Heat cooking oil or butter in a deep fryer or large pan to 350°F (175°C).

Dip the apple pieces into the batter, ensuring they are well coated.

Carefully drop the batter-coated apple pieces into the hot oil.

Fry the fritters until golden brown and cooked through, about 3-5 minutes per side.

Remove the fritters from the oil and place them on a wire rack to drain excess oil.

Sprinkle the fritters with sugar while they are still warm.

Serve the apple fritters immediately.