Premium Cassava Flour Mix

•  1 1/2 cups Premium Cassava Flour•  2 teaspoons baking soda•  1 teaspoon baking powder (aluminum free)•  1 teaspoon xanthun gum•  3/4 teaspoon salt•  1 /2 cup unsalted butter•  1 /2 cup shortening (we like Spectrum)•  1 1/3 cups smooth peanut butter (room temperature)•  3/4 cup firmly packed brown sugar•  1 cup sugar•  2 large eggs•…