Position the oven rack in the middles of the oven and preheat to 350ºF.
In a small bowl mix the psyllium husk with ¼ cup water and set aside for 5 minutes to thicken.
In a large bowl, mix together the oat flour, almond flour, cocoa powder, coconut sugar, baking powder, and salt.
Now add in the milk, vanilla extract, and thickened psyllium mixture. Mix together until no dry spots remain and everything is combined.
Transfer the batter to the silicone donut pans so that the batter is flush with the surface of the pan (this should be about 1/3 cup batter for each donut). Distribute the batter evenly using your fingers or a spatula.
Bake in the oven for 16 to 18 minutes or until the donuts are firm to touch.
Remove from the oven and let cool in the donut pans for about 10 minutes then pop the donuts out and let cool on the cooling rack. When completely cooled, smear the pumpkin frosting all over the donuts and garnish with flaky salt, cacao nibs, or toasted almonds if desired. Sometimes I like to frost and serve them when they’re still warm! You can also serve the frosting alongside the donuts as a donut dip!