Step 1: Prepare the Dough
For the bread machine method:
- Place the liquid ingredients in the pan: Start by adding the water, buttermilk, beaten egg, and melted butter into the bread machine pan.
- Add the dry ingredients: Measure out the flour, sugar, salt, and yeast. Add the dry ingredients into the bread machine, but make a small indentation in the flour to create a well for the yeast.
- Start the dough cycle: Set the bread machine to the dough setting and let it do the work.
For the stand mixer with dough hook method:
- Activate the yeast: In a small cup, pour the warm water and sprinkle the yeast over it. Let it sit for about 5 minutes until it becomes frothy. This will activate the yeast.
- Combine the dry ingredients: In a large bowl, mix the flour, sugar, and salt. Make a well in the center.
- Add wet ingredients: Into the well, pour the buttermilk, beaten egg, and melted butter along with the yeast mixture. Stir everything together until a dough forms.
- Knead the dough: If using a stand mixer, knead the dough on low speed with the dough hook for about 5 minutes. If doing it by hand, knead the dough on a floured surface for about 10 minutes until the dough is smooth and elastic.
- Let the dough rise: Cover the dough with a clean cloth and let it rise for 1 to 2 hours until it has doubled in size.
Step 2: Shape the Doughnuts
- Roll out the dough: Once the dough has risen, place it onto a floured surface. Roll it out to about a 1/2 inch thickness.
- Cut out the doughnuts: Use a round cookie cutter (about 3 inches in diameter) to cut out the doughnuts. Use a smaller cutter to create the holes in the center. If you have a doughnut cutter, this will save you time.
- Let the doughnuts rise again: Place the cut-out doughnuts on parchment paper and cover them with a cloth. Let them rise in a warm place for about 30 minutes to 1 hour until they double in size again.
Step 3: Fry the Doughnuts
- Heat the oil: In a deep fryer or large pot, heat the oil to about 350°F (180°C). If you don’t have a thermometer, test the oil by dropping in a small piece of dough—if it sizzles and rises to the surface, it’s ready.
- Fry the doughnuts: Carefully drop the doughnuts into the hot oil using parchment paper. Fry them for 2-3 minutes per side, or until they turn golden brown.
- Drain the doughnuts: Remove the doughnuts from the oil and place them on a paper towel-lined platter to drain any excess oil.
Step 4: Coat the Doughnuts
While the doughnuts are still warm, roll them in a bowl of sugar to coat them evenly. This will give them a delicious sweet exterior. You can also opt to dust them with powdered sugar or cinnamon sugar for extra flavor.
Step 5: Fill the Doughnuts (Optional)
If you’re adding filling, use a skewer to make a small hole in the center of each doughnut. Then, using a piping bag, fill them with jam, chocolate hazelnut spread, or whipped cream.