The SI base unit for mass is the kilogram. 1 kilogram is equal to 1000000 mg, or 1000000000 mcg. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between milligrams and micrograms.
1 Your potato shell should be about 1/4-inch thick. 2  Mash the potato pulp and add the milk, sour cream, butter, salt and pepper and stir together with a whisk. 3  Carefully add 1/4 cup of cheddar cheese, the black beans and the corn.
Sprinkle the potato with a generous pinch of Kosher salt, and place the potato back on the baking sheet upside down so that it can cook evenly on both sides. Return to oven and cook for an additional 20 minutes. Check for doneness by squeezing the potato (using an oven mitt since it's a hot potato!).