Preheat the oven to 350 degrees fahrenheit. Spray your donut pan with non-stick cooking spray and set aside.
Add melted butter, eggs, raw cane sugar, pumpkin puree, vanilla extract, pumpkin pie spice, salt and baking powder to a large bowl. Mix on medium speed until thoroughly combined. Slowly add in the flour, mixing well between each addition until all the flour is mixed in and the batter is smooth.
Transfer the batter to a piping bag. If you don’t have a piping bag, you can use a gallon zip-top bag and cut a small hole in the corner of the bag. This will make filling the donut pan a lot easier and cleaner.
Fill the donut wells about 3/4 full. Gently tap the donut pan on the counter to evenly settle the batter. Bake for 15-18 minutes or until a toothpick comes out clean. Remove the donuts from the oven and allow them to cool for 5 minutes, loosen their edges and transfer to a cooling rack.
While the donuts are cooling, mix together cinnamon and sugar in a small bowl. Set aside.
Once the donuts are no longer fragile but still slightly warm, use a pastry brush to brush the melted butter on both sides of the donuts. Next, lay each side of the donut in a bowl and coat in the cinnamon sugar mixture. Serve warm and enjoy!
Notes
Store in an airtight container for up to 3 days. Avoid storing in a plastic bag, as this can make the donuts soggy.