Thinly sliced Yukon Gold potatoes are layered with fresh jalapeños and a garlicky cream cheese and sharp cheddar sauce, then baked under a golden cheddar and Parmesan topping. It has all the flavor of classic jalapeño poppers with very mild heat, and it works for a holiday table or a weeknight dinner.
Preheat the oven to 375°F. Lightly grease an 8-inch square or 2-quart baking dish.
Wash the potatoes and slice them into even, ⅛-inch-thick rounds using a mandoline or sharp knife.
Melt the butter in a medium saucepan over medium-low heat. Add the garlic and cook for about 30 seconds, until fragrant. Pour in the milk and warm gently without boiling.
Reduce the heat to low. Whisk in the cream cheese until smooth, then stir in 1 cup of the cheddar, the smoked paprika, salt, and black pepper. Stir until melted and creamy. Remove from the heat.
Arrange one-third of the sliced potatoes in the prepared baking dish, overlapping slightly. Scatter one-third of the jalapeño slices over the potatoes and spoon over one-third of the cheese sauce. Repeat twice, finishing with the remaining sauce. Reserve a few jalapeño slices for the topping.
Cover the baking dish tightly with foil and bake for 45–55 minutes, or until the potatoes are nearly fork-tender.
Remove the foil and sprinkle the remaining ½ cup cheddar and the Parmesan evenly over the top. Arrange the reserved jalapeño slices over the cheese.
Return to the oven, uncovered, and bake for another 15–20 minutes, until the potatoes are completely tender and the cheese is melted, bubbling, and golden brown.
Allow the casserole to rest for 10–15 minutes before serving. Garnish with sliced green onions, if desired. Enjoy!
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Notes
Leave the skins on or peel if preferred
If vegetarian, use Parmesan made without animal rennet.
For more heat, leave the seeds and ribs in the jalapeños. For milder potatoes, remove them before slicing.
Store leftovers covered in the fridge for up to 4 days. Reheat covered in the oven until warmed through.