Preheat oven to 350 degrees. Line 2 baking sheets with parchment paper or silicone baking mats.
In a large mixing bowl, whisk together the brown rice flour, potato starch, flax, baking powder and salt. Work the Earth Balance into the mixture with your fingers until it resembles coarse crumbs with some larger pieces in it.
In another mixing bowl, whisk together the banana, Sunbutter, 1 cup coconut milk, 1 tablespoon vanilla, lemon juice and sugar. Add to the flour mixture and fold together with a spatula.
Using an ice cream scoop or large spoon, drop 6 mounds of the batter onto each of the prepared pans. Brush the tops of the scones with some coconut milk. Bake for 25 minutes or until golden brown.
Let the scones cool on the baking sheets for 5 minutes. Place a piece of waxed or parchment paper on a work surface then place a cooling rack on top. Let the scones finish cooling on the cooling rack. While they are cooling, prepare the glaze.
Glaze
In a small mixing bowl whisk together the 2 tablespoons of Sunbutter, 2 teaspoons of vanilla and 2 tablespoons of coconut milk. If the Sunbutter does not blend easily, microwave for 10 – 15 seconds. Add the powdered sugar and whisk stir together with a fork until smooth. If the glaze is too thick, add some more coconut milk, a few drops at a time. Drizzle the glaze over the cooled scones.