Everything you love about Boston cream pie but in fried form! Airy yeasted donuts are filled with silky vanilla custard and finished with a decadent chocolate glaze.

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Ingredients

Chocolate Glaze
Donuts

Directions

Instructions Checklist
  • Chocolate Glaze: Combine chocolate, confectioners' sugar, cocoa, salt, and butter in a small bowl. Heat cream in a small pot over medium-high until bubbling around edges, 1 to 2 minutes. Pour hot cream over chocolate mixture; let stand 1 minute. Add vanilla and whisk until mixture is smooth and has the consistency of hot-fudge sauce. If it's too thick, add more cream, 1 tablespoon at a time. (Makes 1 1/3 cups.)

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  • Donuts: Whisk together flours. Combine water and milk in the bowl of an electric mixer fitted with the dough-hook attachment, then sprinkle yeast over top. Stir in 1 cup flour mixture. Cover with plastic wrap; let stand in a warm place until bubbling and doubled in volume, about 1 hour. Add egg and yolk, granulated sugar, salt, and remaining flour mixture. Beat on medium speed 3 minutes. Continue beating while adding butter, a few pieces at a time, beating to combine after each addition. When all butter has been added, keep beating until a shiny, sticky dough forms around hook, about 4 minutes more. Scrape down sides of bowl.

  • Cover dough with plastic wrap. Let stand in a warm place until almost doubled in volume, about 1 hour. Refrigerate at least 8 hours and up to 24.

  • Cut out 9 three-inch squares of parchment. Spray a baking sheet with oil; arrange parchment squares in a single layer. Spray parchment. Transfer dough to a lightly floured baking sheet; pat out 1/2 inch thick. Using a floured 2 3/4-inch square cutter, cut out 9 squares. Transfer to parchment squares. Drape with oil-sprayed plastic wrap and let stand in a warm spot until slightly more than doubled in bulk and very soft, about 1 hour.

  • Meanwhile, pour oil into a large, deep, heavy pot, such as a Dutch oven, until it reaches 2 inches up side, leaving about 2 1/2 inches headroom. Clip a deep- fry thermometer to pot and heat oil over medium to 350 degrees to 360 degrees. Working in batches of 3 so as not to crowd pot, carefully use parchment to transfer donuts to hot oil and cook, flipping a few times, until puffed and golden brown all over, 2 to 3 minutes total, maintaining oil temperature between 350 degrees and 360 degrees at all times. Transfer donuts to a wire rack set in a rimmed baking sheet; let cool completely.

  • Fill a pastry bag fitted with a coupler and a Bismarck piping tip (such as Ateco #231) with about 1/2 cup pastry cream. Fill each donut with about 1 tablespoon cream (it should puff slightly in center). Dip top of each donut in glaze until halfway submerged, turning as needed to evenly coat one side, then place, glaze-side up, on rack. Let stand until glaze sets.

Cook's Notes

To make these in a single day: After the dough doubles in volume in step 2, pat it out 1/2 inch thick on the sheet, then refrigerate for 30 minutes before cutting and proofing again.

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