01 -
In a large mixing bowl or stand mixer, combine the flour, salt, and sugar. Create a well in the center. Pour the warmed milk into the well and sprinkle the crumbled fresh yeast (or dried yeast) over the milk. Let it sit for 5 minutes until foamy. Add the softened butter and beaten eggs to the bowl. Knead the dough on low speed (or by hand) until the ingredients are fully combined and the dough becomes smooth and silky, about 8 minutes.
02 -
Form the dough into a smooth ball and place it in a greased bowl. Cover with a damp cloth. Let the dough rise in a warm, draft-free place for about 90 minutes, or until doubled in size.
03 -
Roll the dough out onto a lightly floured surface to about 1/2 inch thickness. Use a 2¼-inch cookie or biscuit cutter to cut out rounds. Place the rounds on a parchment-lined baking sheet and cover with a light cloth. Let them rest for 10 minutes (or 5 minutes in a warm kitchen).
04 -
Heat about 1 inch of vegetable oil in a deep pan over medium-low heat to 350°F (175°C). Fry the bomboloni in small batches, 5-6 at a time, until golden brown on both sides. Flip carefully with a slotted spoon. Drain on paper towels and allow to cool slightly.
05 -
Use a small paring knife to make a slit in the center (or side) of each bombolone, creating a pocket for the filling. Fill a piping bag or a small Ziploc bag with custard (or your chosen filling), snip the tip, and pipe about a teaspoon of filling into each pastry.
06 -
Dust the filled bomboloni generously with powdered sugar. Serve warm or at room temperature.