Chocolate-Orange Truffle Cake

Ingredients

• Crust

  • 1 1/2 cups (210 g) chocolate cookie crumbs
  • 2 tbsp sugar
  • 1/2 cup (115 g) unsalted butter, melted
  • 1 pinch fleur de sel

• Cake

  • 15 oz (425 g) 60% dark chocolate, chopped
  • 1 cup (225 g) unsalted butter, cubed
  • 1 orange, zest finely grated
  • 6 eggs, at room temperature
  • 1/4 cup (55 g) sugar
  • Cocoa powder, for sprinkling

• Toppings

  • 1 cup (250 ml) 35% whipping cream
  • 3 tbsp icing sugar
  • Chocolate shavings
  • Dried orange slices (optional) (see note)