Creamy Garlic Cheesy Potatoes

Why This Creamy Garlic Cheesy Potatoes Works

As the butter and garlic warm on the stove, the garlic softens and spreads through the butter. Flour goes in and soaks up the melted butter, so when the milk is whisked in, it doesn’t separate or stay thin. After a few minutes on the heat, the milk and flour mixture thickens into a smooth sauce that can actually cling to the potato slices instead of running off. Once the cheddar is stirred in, it melts into that hot sauce and stays evenly mixed, so every slice of potato gets some cheese on it.

When the sliced potatoes bake in that thick cheese sauce, the heat slowly softens the potatoes all the way through. Their starch also seeps out into the sauce and makes it even creamier and thicker. Covered baking keeps the moisture in so the potatoes steam and turn tender instead of drying out. Near the end, the foil comes off, the Parmesan on top browns, and the edges bubble, so the top is a little crisp while everything underneath stays soft and cheesy.

Mistakes To Avoid

Cutting the potatoes too thick means the centers stay firm while the edges turn mushy. In the oven, the sauce bubbles and thickens before the thick slices have time to soften, so the dish comes out with hard bites hidden in creamy sauce.

Letting the roux and milk mixture stay thin on the stove causes trouble later. When it doesn’t thicken in the pot, it never really sets in the oven, so the potatoes end up swimming in a runny, soupy sauce instead of a creamy one that clings to each slice.

Adding the cheddar while the sauce is boiling hot can make it turn grainy and oily. The cheese separates instead of melting smoothly, so the finished potatoes have little pools of orange grease and a rough, curdled texture in the sauce.

Skipping the foil for the first bake often leads to burnt tops and undercooked centers. The top layer of potatoes dries out and browns too fast while the layers underneath stay firm and not fully tender.