Valentine's Decadent Steamed Chocolate Cake

Chocolate Cake

• 4 oz unsalted butter, in pieces, plus extra to grease
• 4 oz sugar
• 3 oz evaporated milk
• 3 oz all-purpose flour
• 4 tbsp cocoa powder
• 1 tbsp instant espresso powder
  or 1 tsp vanilla extract
• 1 large egg
• ½ tsp baking powder
• ½ tsp baking soda
• 1 pinch salt
• 35 oz water

Chocolate Ganache

• 4 oz bittersweet chocolate, in pieces
• 4 oz heavy whipping cream

White Chocolate Heart

• 2 oz white chocolate, in pieces