01 -
First things first, grab your trusty 6-quart (or larger) slow cooker. Give the inside a good spray with cooking spray. This tiny step is so important, honestly, because nobody wants cheesy goodness stuck to the sides. I usually forget this part and then spend ages scrubbing later, so learn from my mistakes, hon!
02 -
In your slow cooker, add the unsalted butter. Turn it on high for about 10-15 minutes to let the butter melt. Once it’s nice and melty, whisk in the all-purpose flour. Stir it constantly for about 1-2 minutes until it forms a thick paste, almost like a roux. This is where the sauce starts to get its luxurious body, don’t rush it. I remember once I didn't whisk enough and had flour lumps, oops!
03 -
Now, gradually whisk in the whole milk, heavy cream, and evaporated milk until everything is smooth. Next, add your cream cheese, Dijon mustard, garlic powder, onion powder, salt, black pepper, and that tiny pinch of cayenne, if you're using it. Whisk it all together until the cream cheese starts to break down and everything looks well combined. It'll smell so good already!
04 -
Stir in all of your freshly grated sharp cheddar, Gruyere, Monterey Jack, and Parmesan cheeses. Give it a good, gentle stir until the cheeses are mostly mixed in. Don't worry if they're not fully melted yet; the slow cooker will work its magic. This is where you really start to see the potential for that glorious, cheesy texture.
05 -
Finally, add your uncooked elbow macaroni to the slow cooker. Stir it really well, making sure all the pasta is submerged in that creamy cheese sauce. Cover your slow cooker and cook on LOW for 2-3 hours, or on HIGH for 1-1.5 hours. Seriously, check it around the 2-hour mark for low, or 1-hour for high. I've definitely overcooked the pasta before, and it gets mushy, which is a tragedy!
06 -
After the cooking time, give the Creamy Slow Cooker Four Cheese Mac and Cheese a good, thorough stir. The sauce will thicken as you stir, and the pasta should be perfectly tender. If it seems a little loose, don't panic! Let it rest, uncovered, for about 10-15 minutes; it will thicken up beautifully. The aroma filling your kitchen will be incredible. Serve it warm, maybe with a sprinkle of fresh chives or a dash of your favorite hot sauce. Pure comfort, honestly.