Place the apples in a large saucepan. Sprinkle over the sugar and vanilla extract. Cover and cook over a medium heat, stirring occasionally, until the sugar has dissolved.
Remove the cover and cook for another 10-15 minutes until the fruit is soft. Break the apple up using a wooden spoon.
Remove from the heat and mash a few times until you have a thick puree. Spoon into bowls and serve hot or cold.