few tsp jam (any flavour)
50²µ/1¾´Ç³ú peanut butter
50²µ/1¾´Ç³ú plain flour
100²µ/3½´Ç³ú caster sugar (or soft light or dark brown)
25g/1oz cocoa powder
75g/2¾oz unsalted or salted butter, plus extra for greasing
1 free-range egg, beaten
ice cream, cream or custard, to serve (optional)