Preheat oven to Gas 4/180C/350F

Line a 23cm x23cm (9in x9in) tin with baking parchment leaving an overlap to allow you to lift the brownies out when cooked

Sift cocoa and baking soda together into a bowl

Add boiling water and butter mixing well

Stir in sugar and apple then add flour, vanilla and salt

Mix well and add in the nuts with the chocolate chips

Pour into lined tin and bake for 35 - 40 minutes. Check after 30 minutes and take out when still soft in the middle. They will firm up as they set

Cool for 15 minutes and then lift out using the paper overlap and cut into 12 slices or more if you would like them smaller, Enjoy!!