This is an amazing cake -- so light, and still such intense flavors. I looked and looked, but could not find a plain orange-flavored chocolate, so I used a Lindt dark chocolate bar called "Intense Orange" that also had ground almonds in it. I do want to caution to watch the cake carefully -- mine was browned in 35 minutes and passed the "knife test," so I took it out. It had a lovely texture, and was a huge hit at the party I brought it to. Thank you for posting the recipe.