Brioche Donuts

Name: Brioche Donuts
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: French
Ingredients: 110 g Whole milk (lukewarm); 50 g Granulated sugar; 12.5 g Fresh yeast (Can be substituted with 5g (1.5 teaspoons) instant yeast); 1 Egg yolk (room temperature); 1 Egg (room temperature); 250 g Bread flour (High protein content flour. Can be substituted with all-purpose flour.); ¼ teaspoon Salt; 120 g Unsalted butter (room temperature, soft); 1.5 liter Vegetable or Canola oil (for frying)