Preheat the oven to 350. Grease a 9x11 baking dish with non stick spray.
In a small bowl, mix the warm water and ground flax seed together and set aside until a gel forms.
In a large mixing bowl, mix the melted vegan butter, vanilla, salt, baking powder, sugar, and almond milk together. Then, add the flax seed meal mixture and mix. Add the flour and oats and mix until a thick batter is formed.
Transfer half of the batter into the baking dish and sprinkle the top with the cinnamon. Then, add the remaining batter to on top and use a fork or knife to create swirls.
Bake in the oven for 35-40 minutes or until you can smell the oats baking and they are golden around the edges.
Allow the oats to cool. While they cool, use an electric hand mixer to mix the vegan butter, cream cheese, and powdered sugar to make the vegan cream cheese frosting. If the frosting is too thick to drizzle, you may need to add a splash of almond milk (about 1 tbsp)
Cut the bars into 16 squares and then drizzle the frosting over the bars. Enjoy!