2 tsp instant espresso powder (or coffee granules)
65g/2ΒΌoz soft light brown sugar
2 tbsp caster sugar
2 tsp cocoa powder
125²µ/4Β½΄Η³ϊ icing sugar, sifted
ΒΌ tsp salt
450g/1lb self-raising flour, plus extra for dusting
1 tsp vanilla bean paste
100²µ/3Β½΄Η³ϊ dark chocolate, finely chopped (or chocolate chips)
1 tbsp unsalted butter, melted
100²µ/3Β½΄Η³ϊ unsalted butter, melted, plus extra for greasing
1 tbsp unsalted butter, softened
2 tbsp full-fat cream cheese
2 medium free-range egg yolks
200ml/7fl oz whole milk, plus extra for glazing