Place a glass bowl over a saucepan of boiling water, melt the butter, chocolate orange juice and zest together.
In a separate bowl, cream together the eggs and castor sugar.
Fold the egg mixture into the chocolate mix. Then sift the flour on top and gently fold into the wet mixture.
Divide mixture into muffin moulds that have been buttered and well-floured. These desserts can now be frozen and defrosted for use later or chilled and cooked to order.
To bake from fridge, (not frozen) cook at 210ºC for 6-8 minutes individually or for 8-10 minutes in large quantities.
Bake until the outsides are light and fluffy, but hold their shape and come out of the mould easily, but are still soft and runny in the middle.
Serve immediately with ice-cream and fresh berries.