Preheat oven to 325
Butter and flour a 10 cup bundt pan
In a medium bowl whisk together the flour, baking powder, cardamom and 1 tsp salt. Set aside.
Whisk the the sour cream and pumpkin puree. Set aside.
In a stand mixer with the paddle attached add the butter and the sugars and beat on medium speed until well combined, about 2 to 3 minutes.
Add the eggs and vanilla and mix on medium low until it comes together. It will look curdled so don't worry.
Have the mixer on low and add the flour mixture in 3 additions, alternating with the sour cream mixture in 2 additions. Scrape the bowl as needed.
Spoon the batter into the prepared bundt pan - gently tap it a couple of times to allow the batter to settle and to release the air bubbles.
Bake in the preheated oven for 50 - 55 minutes until a tester comes out clean.
Cool on a wire rack for 15 minutes, then unmold to cool completely.
While the cake is cooling make the glaze: mix the maple syrup, salt and confectioner's sugar until smooth. Drizzle over the cooled cake. Dust with luster dust or edible glitter if desired.