Bring cream to a boil and add in bitter chocolate and butter, mix well.
Leave to cool and store in the chiller till further use.
Chocolate Cake Batter:In a large mixing bowl, sift flour and mix all ingredients together to form a batter.
Ensure all ingredients in bowl are mixed well and no lumps are present.
Pour the batter into a ramekin about ½ full and add in a teaspoon full of chilled ganache, fill with batter again until ¾ full.
Pre-heat your grill together with the Weber Q Roasting Rack and Shield on indirect heat, medium-low heat to 180°C.
Place the chocolate lava cake onto the roasting rack and bake for 20 minutes or until the chocolate cake has set on the exterior but still liquid texture in the middle.
Remove from the grill, sprinkle with powdered sugar.