In a bowl, combine flour, powdered milk, sugar, instant yeast, salt, butter or margarine, egg yolk, and warm water.
Mix until just combined, then knead the dough in a mixer on low to medium speed for at least 25 minutes, or until it passes the windowpane test. If kneading by hand, ensure the dough passes the windowpane test for light and fluffy doughnuts.
Avoid adding too much flour; the dough will be sticky at first but will come together with kneading.
Cover the dough and let it rest for 30-40 minutes, or until it doubles in size.
Divide the dough into 12 parts (38-39 grams each) using a scale for accuracy.
Quickly and tightly round the dough into balls, coating the bottoms with flour, and place them on a parchment-lined tray.
Cover and allow the dough to double in size, leaving space between each doughnut.
Open the doughnuts 10 minutes before frying.
Heat the oil to 170°C. Test with a wooden stick; bubbles around the stick indicate the oil is hot enough.
Fry the doughnuts on low to medium flame until golden brown, flipping halfway through. Fry for 5-10 minutes in total.
Drain the doughnuts and toss them in caster sugar if desired.
Once cooled, fill the center of the doughnuts with your favorite filling.
Check my next post for the filling recipe..