Lightly warm the milk then whisk together with the active dry yeast in the bowl of your mixer. Make sure the milk is no hotter than 120℉ before adding the yeast.
Add in the rest of your ingredients to the mixer bowl except the second measurement of sugar. With the paddle of your stand mixer or dough attachment for your hand mixer, mix on low speed until a dough comes together and it scrapes the sides of the bowl.
If using a stand mixer, switch to the dough hook and increase speed (for both hand and stand mixer) to medium low. Mix until you pass the windowpane test.
Cover and allow to proof until tripled in size.
Roll out the dough to half an inch thick and use a 3" ring cutter to cut. Place the rounds on a lightly sprayed sheet pan. Knead together any scraps, reroll, and cut again. Repeat until you do not have enough dough for a final donut.
Spray the tops of the rounds and cover with plastic wrap. Allow to rise for another 30-60 minutes. When you have 15 minutes left, prepare your frying station (see tips above), turn on the heat, and make sure it hits 350-375°F.
Carefully remove the donuts from the pan (you don't want them to deflate!), and carefully add to the frying pan. I use my hands but if you don't feel comfortable, you can use a metal spatula, slotted spoon/spider, or a pair of tongs. Depending on the size of the pot depends how many you can fit in. I will usually squeeze them in with a little wiggle room.
Allow to fry for 2-3 minutes per side and flip once when it turns golden brown. You can check their internal temperature for doneness; it should read at least 190℉.
Remove from the oil, let the oil drip off and place onto a cooling rack with paper towels beneath.
Allow the oil to get back to the 350-375° temperature range and repeat until you have fried all the donuts. Allow to cool before filling.