1 ¾ cups of All Purpose Flour
1 ½ cups of Potatoes, cooked until very soft, peeled and mashed
1 Egg
2 Tbsp of Unsalted Butter, softened at room temperature
¼ cup of Granulated Sugar
2 tsp of Dry Yeast
¼ cup of Milk, slightly warm
Zest of One Small Lemon or Half of a Large Lemon
½ tsp of Salt
2 Tbsp of Limoncello (optional)
1 tsp of Vanilla Extract (optional)
Lots of Vegetable oil or Canola oil for frying
About 2 Cups of Granulated Sugar, to coat the doughnuts