Chocolate Fondant Birthday Cake

I have been intrigued for awhile now about decorating a cake with fondant and wondering if it would turn out as pretty as they always look in pictures, etc. Watching a few episodes of Cake Boss on Netflix made it look so easy! So, since I had a birthday coming up for a wonderful sister, I decided to try it out on her cake. She had asked for chocolate mousse, but I had no experience with that, and didn't want it to turn out to be a total flop when others were expecting a tasty birthday treat!  So, she agreed to a chocolate cake with a mousse-like filling.

I used this recipe from Joy of Cooking for Sour Cream Fudge Cake. It is so moist and delicious!

3 oz unsweetened chocolate (I used 60% chocolate)
1 3/4 cups cake flour
1 1/2 cups sugar
1 tsp baking soda
1 tsp salt
1 cup sour cream
6 tbls unsalted butter, softened (3/4 stick)
2 large eggs
1 tsp vanilla
1/4 hot water or coffee

Preheat oven to 350. Melt chocolate and set aside.  In a large bowl, sift together flour, sugar, baking soda and salt. Add sour cream and softened butter and beat on high speed for exactly 2 minutes.  Add the melted chocolate, eggs, vanilla and coffee and beat for exactly 2 minutes.  Spread evenly into two floured and greased 8x8 pans or two 9x2 round pans or one 9x13 pan. Bake at 350 for 20-25 minutes for smaller pans or 25 to 30 minutes for 9x13 pan.