The Best Gluten Free Chocolate Cake

Bahan-bahan (18 porsi)

• ⅓ cup potato starch
• ⅓ cup sorghum flour
• ⅓ cup brown rice flour
• 1¼ cup sugar
• ⅓ cup , plus 2 tablespoons cocoa powder, preferably dutch process
• 1 teaspoon baking soda
• ½ teaspoon kosher salt
• ½ cup sour cream
• ½ cup light flavored olive oil
• ¾ cup water (room temperature)
• 1 tablespoon plain white vinegar
• 1 teaspoon vanilla
• 1 egg
• Salted Caramel Frosting