Preheat oven to 350F and spray a donut pan with oil; make the crumb mixture and set aside
In a large bowl, add dry ingredients (flour, baking powder and soda, cinnamon and nutmeg) and whisk together; set aside
In a separate bowl, add pumpkin puree, butter, egg, milk, greek yogurt, and vanilla extract; whisk together until well combined
Add wet ingredients to the dry ingredients and fold together until a batter is made
Using a ziplock bag, add the batter and cut the tip off the ziplock bag; pipe the batter into the donut pan and top with the crumb mixture
Bake on the center rack for 10-12 minutes and allow to cool for 10 minutes
Drizzle with icing or powdered monkfruit sweetener