In a large bowl combine dry ingredients: gluten-free flour, instant yeast, baking powder, brown sugar. Next, add warm oat milk, vegan margarine, and vanilla.
Create a smooth and fluffy dough and let it rest in a warm place for 1 hour.
Meanwhile, combine the ingredients for the cinnamon filling, which are vegan margarine, sugar, and cinnamon.
When the dough has doubled in size, transfer it to a well-floured surface and roll it out into a rectangle.
Carefully spread the cinnamon mixture over the dough and cut the 8 long stripes horizontally. Roll the stripes into cinnamon rolls and place them into the baking pan aligned with the baking sheet.
Let them sit covered in a warm place for about 30 minutes.
Bake them at 400F (200°C) for about 15 minutes.
Serve with dusted sugar or with creamy sugar frosting. Enjoy!