1 tbsp maple or golden syrup
3 tbsp plain flour
50²µ/1¾´Ç³ú soft light brown sugar
3 tbsp cocoa powder
50²µ/1¾´Ç³ú dark or milk chocolate chips
¼ tsp sea salt flakes
1 tsp vanilla extract
50²µ/1¾´Ç³ú walnut pieces
50²µ/1¾´Ç³ú unsalted butter
1 large free-range egg