Preheat the oven to 350 degrees F (175 degrees C). Spray two 8-ounce ramekins with cooking spray on the bottom and sides.
Combine oats, almond milk, banana, cocoa powder, maple syrup, baking powder, vanilla extract, and salt in a blender. Blend until all is combined well, 30 to 60 seconds. Fill mixture into the prepared ramekins and sprinkle each with 1 tablespoon chocolate chips.
Bake in the preheated oven until firm, about 25 minutes.