Pre-heat the oven to 350 F. Generously spray a 10 cup bundt pan (have some mini loaf pans handy in case you have extra batter--this recipe may or may not have been intended for a 12 cup bundt pan--if you linked to the recipe you will notice it claims a 6 cup bundt pan which is definitely not right) with nonstick baking spray. Set aside.
Bake for 50-55 minutes, until the cake begins to pull away from the sides of the pan and a cake tester comes out clean of batter (although it may have dulce de leche on it). Cool for 15 minutes and then turn out onto a cooling rack. Cool completely before slicing. Sprinkle with powdered sugar if desired.