Instructions
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Make the Cream Sauce: In a medium-sized bowl, whisk together the heavy cream, milk, flour, salt, black pepper, garlic powder, and onion powder. Continue whisking until the flour is fully dissolved and the mixture is smooth.
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Create the Layers:
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Arrange a single, even layer of potato slices on the bottom of the slow cooker.
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Pour a portion of the cream sauce over the potatoes, then sprinkle with a portion of both cheddar and Parmesan cheeses.
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Repeat these layers—potatoes, sauce, cheese—until all ingredients are used, finishing with a final layer of cheese on top.
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Final Toppings: Dot the top evenly with the small pieces of butter and sprinkle the paprika over everything for color and a subtle smoky note.
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Cook:
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For the Best, Most Tender Results: Cover and cook on LOW for 6-8 hours.
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The dish is ready when the potatoes are fork-tender and the top is golden and bubbly.
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Rest and Serve: Once cooked, turn off the slow cooker and let the potatoes rest, uncovered, for about 10-15 minutes before serving. This allows the sauce to thicken slightly, making it easier to slice and serve.
Chef’s Note
For perfectly even cooking, try to slice your potatoes to a uniform thickness, about ⅛-inch thick. A mandoline slicer is the perfect tool for this job!