Red Velvet Cake from Waldorf Astoria Cookbook

Ingredients:
3 oz unsweetened chocolate, chopped
2 cups granulated sugar
4 large eggs
1½ cups vegetable oil
1½ tsp pure vanilla
2 cups AP flour
2¼ tsp baking soda
¼ tsp salt
3 cans (12 oz) canned beets, drained and pureed
1 tsp red food colouring

For the Icing:
2 cups whipping cream
12 oz cream cheese, room temperature
12 oz mascarpone cheese
½ tsp vanilla extract
1½ cup icing sugar, sifted

Method:
For the Cake:

1. Preheat oven to 180°C.
2. Melt chocolate in a metal bowl and set over a saucepan of boiling water or in the top of a double boiler. ( Or, melt in a microwave for 30-40 seconds.)
3. Meanwhile, place sugar, eggs, oil and vanilla in the bowl and mix for about one minute on low speed.
4. Sift together flour, baking soda and salt & add to egg mixture and continue to mix on low speed until well incorporated. 
5. Add melted chocolate and mix on low speed. 
6. Add pureed beets & food coloring. Continue to mix on low speed until all ingredients are thoroughly combined.
7. Divide batter evenly between 3 greased and floured pans and bake for 20-25 mins or until cake springs back when touched, or when toothpick comes up clean.
8. Cool for 10 mins in the pans and turn layers out onto rack to cool completely.

For the Icing:

1. Pour cream into small bowl and whip to soft peaks.
2. Refrigerate.
3. Place cream cheese in a bowl and mix on low speed until soft and smooth.
4. Add mascarpone and mix until combined.
5. Add vanilla and powdered sugar and mix well.
6. Fold in whipped cream by hand with spatula.
7. Refrigerate until ready to assemble.

Improvements to recipe:

1. Add 2 tsp baking powder.
2. Increase red food colouring to 2 tsp to increase intensity of red colour.
3. Replace 2 or 3 oz of chocolate with white chocolate, as original recipe produces a dark chocolate cake.
4. Replace mascarpone cheese with cream cheese, as original recipe produces a very soft & runny icing.