Make the cinnamon sugar

• Mix the sugar with half of the cinnamon in a bowl.

Cook the apples

• Melt a little butter in a saucepan and add the diced apple.
• Sprinkle with the remaining cinnamon and cook until softened.

Make the churro batter

• Bring the water and butter to a boil in a saucepan.
• Add the flour, baking powder and salt and stir into a thick dough.
• Remove from the heat, cool slightly and beat in the egg.

Fold in the apples

• Fold the cooked apple into the churro dough until evenly distributed.

Fry the fritters

• Heat the oil to 175 °C.
• Drop spoonfuls of the batter into the hot oil and fry until golden and puffed.
• Drain on paper towels.

Coat and serve

• Roll the warm fritters in the cinnamon sugar.
• Serve immediately.