Parmesan Garlic Chicken and Potatoes Sheet Pan

This Parmesan Garlic Chicken and Potatoes Sheet Pan has crispy bone-in chicken thighs topped with a rich garlic parmesan butter sauce, roasted right on top of potatoes and green beans. One pan in, one pan out, and dinner is done.

I am a big believer in dinners that clean up in one pan. It’s one of the reasons I wrote a whole cookbook on one pot meals, and this sheet pan dinner fits right into that philosophy even though it takes a little longer than 30 minutes.

This one is simple. Potatoes and green beans on the bottom, chicken thighs on top, and a parmesan garlic sauce spooned generously over everything before it all goes into the oven together. The chicken skin gets golden and crispy, the fat drips down into the potatoes and vegetables, and everything ends up seasoned by everything else. That is the whole trick.

• It’s one pan. Less cleanup, more time for everything else.
• The chicken fat does double duty. As the bone-in skin-on thighs cook, the fat renders down into the potatoes and green beans below. That is flavor you cannot get any other way.
• The parmesan garlic sauce is doing a lot of work here. Butter, garlic, parmesan, mayo, lemon, Italian seasoning. It bakes right onto the chicken and turns into something rich and savory that you will want on everything.
• It’s a complete meal. Protein, starch, vegetables, all done at the same time in the same pan.

• Baby potatoes: Cut into 1.5 inch pieces. They cook at the same rate as the chicken thighs which is exactly what we want.
• Green beans: Trimmed and halved. They roast right alongside everything else and pick up all that chicken fat flavor.
• Bone-in skin-on chicken thighs: Don’t swap these for boneless or skinless if you can avoid it. The bone keeps the meat moist, and the skin renders fat down into the vegetables below. That fat is doing real work here.
• Butter: Melted, for the sauce. Rich and necessary.
• Garlic: 6 cloves, minced. This is not a recipe for the garlic shy.
• Mayonnaise: Sounds unusual in a sauce that goes in the oven but trust the process. It keeps the sauce rich and helps it cling to the chicken.
• Parmesan cheese: Freshly grated, not the shelf stable stuff in the can. The flavor difference is significant.
• Lemon juice: Brightens everything and cuts through the richness of the sauce.
• Italian seasoning and paprika: Simple, classic, exactly what this sauce needs.

Preheat your oven to 425°F and line a large baking sheet with parchment paper.

Place the potatoes and green beans directly on the baking sheet. Drizzle with olive oil, season with salt and pepper, and toss everything right on the pan until evenly coated. Spread into an even layer.

Arrange the chicken thighs on top, skin side up. This is important. The skin needs to face up so it can crisp properly and so the fat renders down through the vegetables below.

In a medium bowl, whisk together the melted butter, garlic, parmesan, mayonnaise, Italian seasoning, paprika, and lemon juice. Spoon this mixture evenly over each chicken thigh. Don’t be shy, you want a good amount on each piece.

Bake for 40 to 45 minutes, until the chicken reaches an internal temperature of 175°F, the potatoes are tender, and the skin is golden and crisp.

Let the sheet pan rest for a few minutes before serving. This gives the juices a chance to settle.

• Use bone-in skin-on thighs. I know I already said this but it matters enough to say again. The bone keeps the chicken moist through the long cook time, and the skin gives you that crispy texture while basting the vegetables underneath with fat as it renders.
• Cut your potatoes evenly. Uneven pieces mean uneven cooking, and you want everything done at the same time.
• Don’t skip the rest time. A few minutes off the heat lets everything settle and makes for cleaner serving.
• Use freshly grated parmesan. The pre-grated stuff in a shaker does not melt or cling the same way and the flavor is noticeably weaker.
• Spoon the sauce generously. This is not the place to be conservative. The sauce is most of the flavor here.

This is already a complete meal, protein, starch, and vegetables all in one pan. But if you want to round it out, a simple green salad and some crusty bread on the side are perfect. Nothing fancy needed.