Step 1

Preheat oven to 180C/350.

Step 2

Grease a 20cm/8" square pan and line with baking/parchment paper with overhang (so it can be lifted out once cooked).

Step 3

Mix together butter, flour, sugar, baking powder and salt until you can no longer see white bits of flour.

Step 4

Add egg and mix.

Step 5

Lightly press 2/3 of the mixture into the bottom of the pan.

Step 6

Bake for 15 minutes until slightly golden, then remove and cool for 5 minutes.

Step 7

Apple Filling: While the base is cooking, mix together Apple Filling ingredients in a bowl.