Follow the donut dough recipe I shared earlier. Let it rise for 60-90 minutes until it doubles in size.
Roll the dough into a 1/2 inch thick sheet and cut out 4” circles. Repeat until you have all the donuts.
Let the donuts rest for about 45 minutes in a warm place.
Heat 2-3 inches of oil in a wok over medium heat. Once it reaches 350°F, carefully drop in a test donut and cook for 2 minutes per side. Fry all donuts accordingly.
For the mascarpone filling, whip egg yolks and sugar over a Bain Marie until they triple in volume. Remove from heat, let it rest for 5 minutes, then whisk in the mascarpone until combined. Finally, fold in the whipped cream.
Slice the donuts in half horizontally. Brush them generously with coffee on both sides (or do a quick dip). Fill the bottom half with mascarpone cream, cover with the top half, and pipe more cream dollops.
Cool for 2 hours, dust with cocoa powder, and get ready to savor these delightful Tiramisu Donuts!