Line a baking sheet with kitchen paper and set aside.
Mix all the glaze ingredients together and set aside.
For the apple fritters: add the baking powder, flour, caster sugar, milk and egg into a large mixing bowl and whisk until you have a smooth batter.
Peel and either finely dice woth a sharp knofe or grate the apple using a box grater. Add to the batter with the apple sauce and mix until combined.
Next, pour the vegetable oil into a medium saucepan - it should come at least ½ but not more than ¾ up the side of the pan. Place over a medium heat - it is hot enough when a small piece of apple sizzles after being dropped in. You can also use a deep-fat fryer and heat the oil to 175C.
Once the oil is at the correct temperature, drop in a spoonful of the batter. It should puff up a little. Cook for 2-3 minutes, or until golden underneath, before carefully flipping over and continuing to fry for around 2 more minutes. You don't want to overcrowd the pan as this drops the temperature but frying 3 at a time usually is fine.
When golden all over, remove from the oil using a slotted spoon and set onto the prepared baking sheet. Leave for about a minute to let any excess oil drain off.
When cool enough to handle, either dunk them directly in the glaze and then lay on a wire rack over a baking tray to allow the excess drip off, or just drizzle the glaze right over the top of the finished fritters. Repeat the frying and glazing with the remaining batter until you have a whole batch of piping hot fritters. Serve straight away.
The video below will help with this recipe.