Raised potato donuts or Spudnuts are soft and airy donuts made by adding mashed potatoes, which makes a soft and tender dough.
Dissolve yeast in 1/2 cup warm water.
In a medium saucepan combine milk, shortening, salt, sugar, mashed potatoes and heat to lukewarm. Set aside.
Pour into the bowl of an electric mixer and add beaten eggs and dissolved yeast. Add the lemon juice, lemon zest, and nutmeg. Add 3 cups flour and beat until smooth. Add remain flour 1 cup at a time to make a soft but firm dough. Cover and let rise until double in bulk.
Punch down the dough and divide in half. Roll out 1/2-inch thick and cut with a doughnut cutter. Cover with a cloth and let rise until double for about 30-40 minutes.
Mix all ingredients until smooth. The chocolate glaze will be thicker than the vanilla glaze.
👉🏻Use a large heavy pot or dutch oven. The pot needs to be deep enough to hold at least 2 inches of oil along with the frying donuts. The pot should be able to hold around 2 quarts of oil.
👉🏻A clip-on thermometer to measure the heat of the oil is essential. Here's why: The oil needs to be heated to 350℉ and that temperature needs to be maintained throughout the entire frying process. Don't worry if the heat goes up to 360-365℉. Once the donuts are dropped into the oil the temperature may go down. As long as the temperature is between 330 - 360℉, the donuts will cook perfectly. If the temperature drops below 350℉, bring the temperature of the oil back up to 350℉ before frying additional donuts.
👉🏻Properly draining the oil from the donuts. Each fried donut is actually drained three times. First) When lifting the donuts from the oil, hold the donut above the pot and let the oil drip from the donut for about 10 seconds. Second) Place cooked donut on a prepared baking sheet that has a few layers of absorbent paper towels. Let the donuts to drain on the paper towels for 30-60 seconds. Third) Remove the donuts from the paper towels and place them on a wire rack to completely cool. This ensures a nice crisp outer layer that will absorb the glaze beautifully.