Wash and cut up potatoes into ½ to ¾ inch chunks.
Put cubed up potatoes in a medium stock pot and cover with water by about a ½ to 1 inch.
Boil potatoes for about 20 minutes or until potatoes are fork tender and starting to round on the edges.
Put butter into a large mixing bowl or serving dish.
Drain potatoes then put them into the mixing bowl or dish on top of the butter to melt it.
Once butter is mostly melted, add in the evaporated canned milk, salt and garlic powder. DO NOT prepare the canned milk per the instructions (water it down). Just add in the full small can, or about half of a larger can.
Stir all ingredients to distribute evenly.
Use a potato masher, mason jar, or whatever tool you have to mash your potatoes to your desired consistency.
Do one final stir after mashing then enjoy!