Preheat oven to 350°.
Grease and flour a 10-in. fluted tube pan using 3 tablespoons gluten-free flour.
In a large bowl, whisk the remaining 2 cups flour and next 9 ingredients.
In another bowl, combine water, almond milk, oil and vanilla until well blended.
Gradually beat flour mixture into milk mixture.
Transfer to prepared pan.
Bake until a toothpick inserted in center comes out clean, 50-55 minutes.
Cool in pan 15 minutes before removing to wire rack to cool completely.
Dust with confectioners' sugar before serving.