

Preheat the oven to 170C (338 F).
Roast the walnuts in the oven for around 10-12 minutes on a baking sheet.
Stir the mixture frequently until all the chocolate and butter is melted and smooth.
Remove the bowl out of the hot water and set aside.
Beat the eggs and sugar in a stand mixer till the combination gains a creamy texture.
Pour in the liqueur and pure orange extract along with the orange zest.