Pour the heated water and yeast into the bowl of your stand mixer that is attached with a paddle. Stir to dissolve the yeast for about a minute.
Add the milk, eggs, butter, salt, sugar, potatoes, and roughly half the flour. Once you have a smooth batter, mix on low speed.
Most of the remaining flour is added after switching to the dough hook. After combining on low speed, knead the dough for 5 minutes on medium speed. Pulling some dough with your fingers will allow you to test it. It should be extremely gooey, stretchy, and nearly flowy. Add the remaining flour and knead the dough if it lacks body. Remember that when it comes to yeast dough, moister is preferable to drier.
When you are satisfied with the dough, take the bowl out of the mixer and use a hand or spatula that has been sprayed with cooking spray to smooth the dough's top.
Cover and let to double in size for around 1 1/2 to 2 hours in a semi-warm environment.
I made two batches, one with parchment-lined trays and the other without. Spray two jelly roll pans with pan spray. You can omit the parchment if you choose because it is not required for this.
Place one half of the dough on each of the prepared sheets after dividing it in half (I weigh mine). To prevent sticking, spray pan spray on your hands and the dough's surface, then begin pushing, patting, and stretching the dough to suit each pan. To give the dough a chance to unwind and make it simpler to stretch, switch between pans.
After the dough has been formed, spray it lightly with pan spray once more, cover it with a lint-free cloth or plastic wrap, and allow it to rise for approximately an hour, or until puffy.