Preheat oven to 350°F and grease an 8x8 baking dish.
In a blender, combine cottage cheese, milk, eggs, maple syrup, and vanilla until smooth.
In a mixing bowl, stir together oats, cinnamon, pumpkin pie spice, baking powder, and salt. Pour in the blended mixture and mix until combined.
Spread the batter into the prepared pan.
Mix the swirl ingredients. Spoon over the top and use a butter knife to gently drag through the batter to create swirls.
Bake for 35–40 minutes, until the center is just set and the edges are golden.
Let cool slightly. Whisk the frosting ingredients and drizzle over the top before slicing.