Recipe for 9" square cake pan.

Preheat oven to 350F. Spray pan with vegetable oil.

In a medium bowl, whisk together the flour mix, tapioca flour, xanthan gum, baking powder, egg replacer and salt. In larger bowl (or mixer bowl) beat shortening and sugar until fluffy. Beat in eggs, one at a time, before adding the vanilla. Alternately stir in the dry ingredients and carbonated beverage until just blended. Pour batter into the prepared pan and bake for 25-30 minutes.

Variations:

For 9 x13cake: double ingredients, except increase baking powder to 2 tsp

Spice Cake: Add 1/2 tsp cinnamon, 1/4 tsp nutmeg, 1/4 tsp allspice, 1/8 tsp cloves. Frost with Maple butter frosting (1 box powdered sugar, 1 cube softened butter, 2 tsp maple flavoring, pinch of salt)