Easy method of sprinkling confectioner's (powdered) sugar: Fill a clean pepper shaker with powdered sugar and use it to lightly dust desserts.
To season your cast iron skillet: Add a few drops of vegetable oil to the skillet. Use a cloth to rub a very thin layer of oil on the entire surface of the skillet: inside, outside, bottom, the handles. Heat the skillet upside down in a 350 F oven for one hour (place an aluminum foil in the lower rack to catch any possible drops of oil). Let the skillet cool inside the oven.
The recipe for this pancake has been adapted from https://cooking.nytimes.com/