Vanilla CreamFilled Doughnuts

"For years before I opened Flour, I had a notebook where I kept menu ideas for when I finally had my own dream bakery. It was filled with all of the pastries I had read about in cookbooks, learned to make at my jobs, and savored on my travels. When it came time to write a menu for the bakery, I realized it was impossible to include everything I wanted to offer. These doughnuts barely made the cut. After all, we were opening less than a block away from an outpost of the ubiquitous Dunkin' Donuts chain. But they ended up being a Flour best-seller. I first learned how to make doughnuts at Payard. A French pastry chef taught me how to make doughnuts that make Americans swoon, though they scarcely resemble what you get at the competition down the street. We only make them on Sundays, and they sell out every week...."