Mashed potatoes are simple but still require proper technique. You might think it doesn't matter whether you boil potatoes whole or chopped, but the latter is the way to go. This will prevent the outsides from getting cooked too quickly. Also, if you want to ensure a truly creamy and delicious result, try steaming the potatoes instead of boiling, which also helps prevent that dreaded gluey, dense texture. Here's a great recipe to try.