Cheesy Jalapeño Potato Gratin with Caramelized Onions

By AislePrompt Editorial · ·

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

Layers of thinly sliced potatoes baked with caramelized onions, spicy jalapeños, and melted cheddar cheese for a rich, comforting side dish. This vegetarian recipe, ready in about 80 minutes, pairs potatoes, onion, jalapeños for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 350 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 20 min Cook: 60 min Serves 6 Comfort Food cuisine 350 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 375°F. In a large skillet, melt 3 tbsp unsalted butter over medium heat. Add 2 thinly sliced large onions and 2 minced garlic cloves, cooking for 15 minutes, stirring often until onions are golden and caramelized.
  2. Step 2: Stir in 3 thinly sliced jalapeños, 1 tsp salt, 1 tsp black pepper, and 1 tsp thyme leaves; cook for 2 more minutes until fragrant.
  3. Step 3: Butter a 9x13-inch baking dish and layer half of the 4 thinly sliced medium potatoes evenly.
  4. Step 4: Spread half of the caramelized onion and jalapeño mixture over the potatoes, then sprinkle 1 cup shredded cheddar cheese evenly on top.
  5. Step 5: Repeat layering with remaining potatoes, onions, and 1 cup cheddar cheese.
  6. Step 6: Pour 1 cup heavy cream evenly over the layered potatoes.
  7. Step 7: Cover with foil and bake for 45 minutes. Remove foil and bake for an additional 15 minutes until the top is golden brown and bubbly.
  8. Step 8: Let cool for 10 minutes before serving warm.

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