Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper.
Thoroughly clean and dry potatoes. Slice in half lengthwise. Spray potatoes liberally with cooking spray season with salt. Place potatoes cut side down on prepared baking sheet.
Roast potatoes for 30 minutes or until the skin is crispy and the center is tender. Set aside to cool for 5 minutes.
Spoon the flesh out of the potato leaving a ¼ inch (½ cm) border of potato in the skin. Place flesh in a bowl and set the skin aside.
To the bowl with the scooped out potato, add maple syrup or cinnamon butter and stir until smooth. Spoon seasoned potato back into the skins.
Top with peanut brittle, a scoop of ice cream, and garnish with rainbow sprinkles, to taste.