<<Disclaimer: Verify this information before applying it to your situation.>>

I also received many requests for the gf cake (from Ed C.)
Here it is:

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    Chocolate Cake

    1 Cup Sugar
    1 Cup Gluten Free Flour (see below)**
    4 Tablespoons Cocoa
    1 Teaspoon Soda
    1 Teaspoon Xanthan Gum (optional)*
    1 Cup Sour Cream***
    2 Eggs
    1 Teaspoon Vanilla

    Sift Sugar, Flour and Cocoa and Xathan Gum together. Mix together Sour
    Cream and Soda, add Eggs and Vanilla. Blend with Flour mixture and beat
    until blended. Pour into prepared pans and Bake at 300 degrees until done.

    Use Duncan Hines Milk Chocolate frosting, which is GF.

    *   You can substitue Guar Gum instead...it costs much less
    **  I use Arrowhead Mills GF baking mix..costs about $4.75 for a 28oz box
        and can be found in health food stores
    *** I substitute plain yogurt (fat free) instead
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