Here is a cake I made for my mom for her birthday. It is her favorite cake that I have ever made. I got the recipe from an old issue of Chocolatier magazine. I don't make this cake often, but it is so good. The only problem I have ever had with this cake is the walnut genoise. The recipe seems like it is right, but every time I bake it, the cake sinks in the middle even while it is in the oven. About 2/3 rds of the way done, it sinks. The cake layer is supposed to be split into two layers for the cake, but since it sinks, you loose about 1/2 of the cake itself, and, therefore, you only get one layer. So frustrating. That means I have to make the cake recipe twice, which seems like a waste. I have researched all my other pastry cookbooks for alternate recipes, tips, tricks or other advice on genoise and nut genoise and have found nothing to explain or fix this. I make the recipe following all the directions, but alas, it always does this.
Anyone who might come across this, if you know how to fix this or have a walnut genoise recipe that never sinks on you, then please leave a comment. I would love to know what to do here.
Anyway, the recipe is for a Mocha Orange Walnut Torte. You have two layers of walnut orange genoise, which get brushed with a Grand Marnier sugar syrup. They are layered with a wonderfully smooth and creamy white chocolate mocha orange ganache/mousse. I make this by boiling heavy cream with whole coffee beans and orange zest. Once it comes to a boil, you take it off heat, cover the cream and let it steep for 10 min. Then you bring it back up to a boil and pour it over your chopped white chocolate. You chill this mixture for 6 hours or overnight then whip it to soft peaks. When you chill it, you leave some of the coffee beans and zest in it to concentrate their flavor. What you get is this lovely mocha and orange flavor to the white chocolate ganache. It is heavenly. So you layer that in between and on top of the walnut genoise. You chill that, then the cake gets a coating of chopped toasted walnuts around the sides. You pipe some rosettes of ganache on the top, and I usually put a piece of orange and a chocolate covered coffee bean on those to make it pretty.
I wish I was a good photographer so I could take food pictures to really do the cakes justice. My black countertops don't make for a good backdrop. But alas, here is the cake. Yumm!!