Directions:

-After gently boiling the peeled & cut potatoes until tender, mash them.
-Cut up the butter into small chunks and add to the mashed potatoes along with the cream and salt. Stir everything until fully combined.
-Refrigerate mixture overnight (or up to 3 days).
-Mix the mashed potatoes with the flour. At first this will be very crumbly, but the mixture will gradually start coming together. Turn the dough out on the counter and knead once or twice to bring it together into a smooth ball. Roll it into a thick log and then divide it into equal portions.
-Roll each portion of dough between your palms to form a small ball. Cover all the balls with a clean dishtowel off to one side of your workspace.
-Set a cast iron skillet or flat grill pan over medium-high heat. When a bead of water sizzles when flicked on the pan, it's ready.
-Dust your workspace and rolling pin lightly with flour. Roll one of the rounds of dough in the flour and then press it into a thick disk with the heel of your hand. Working from the center out, roll the dough into as thin a circle as you can manage. Lift, move, and flip the dough frequently as you work to make sure it's not sticking. Use more flour as needed.
-Roll the lefse gently onto the rolling pin, as if you were transferring pie dough, and lay it in the skillet. Cook for 1-2 minutes on each side until speckled with golden-brown spots. Transfer the cooked lefse to a plate and cover with another clean dish towel.
-While one lefse is cooking, roll out the next one. Keep all the cooked lefse under the towel to keep them warm and prevent them from drying out. If the lefse start to stick to the pan, melt a small pat of butter in the pan and wipe it away with a paper towel to leave only a very thin coating of fat on the pan.
-Spread the lefse with your topping of choice and roll it up to eat. Leftover lefse can stacked with wax paper between the layers to prevent sticking and kept refrigerated for up to a week or frozen for three months. They can be eaten cold from the fridge or warmed for a few seconds in the microwave.