Step 2: To the same bowl, add the pumpkin puree, avocado oil, melted butter, vanilla extract, eggs, brown sugar, and white sugar. Mix everything until just combined. Try not to overmix.
Step 3: Use a large piping bag or Ziploc bag to put your donut mixture in. This will make filling the donut pan SO much easier, and cleaner. Fill a bag easily using the help of a tall glass.
Step 5: For the cinnamon sugar coating, add cinnamon and sugar to a bowl large enough to fit the donut and mix it together. Using a pastry brush, lightly brush the donut with melted butter then dunk it into the sugar mixture.
Step 6: For a vanilla glaze add the ingredients to a bowl and whisk together using more milk for a thinner glaze, and more sugar for a thicker glaze. Dip your donut into the glaze or pour it on top!