Cameron's Best Chocolate Rice Cake

Ingredients

• 1 1/2 cups white rice flour
• 1/2 cup tapioca starch
• 2 tsp baking soda
• 1 tsp cream of tartar
• 1/8 tsp salt
• 1/4 cup cocoa (preferably non-alkalized)
• 1 cup rice milk or water
• 1/4 cup canola oil
• 1 tsp rice vinegar
• 1/4 tsp guar gum
• 1/2 cup white sugar