Steamed Chocolate Lava Cakes

Ganache

• 2 oz semi-sweet chocolate chips
• 2 oz heavy whipping cream

Cake

• non-stick cooking spray
• 6 oz sugar
• 3 ½ oz vegetable oil
• 3 oz plain Greek yogurt
• 1 large egg
• 1 egg yolk, from a large egg
• ¾ tsp vanilla extract
• 3 oz all-purpose flour
• 1 ½ oz unsweetened cocoa powder
• ¾ tsp espresso powder
• ½ tsp baking soda
• ¼ tsp salt
• 14 oz water
• fresh raspberries, to serve
• confectioners sugar, to serve
  or whipped cream, to serve