When you need a dinner that uses up the zucchini sitting on your counter and only dirties a single pan, this cheesy ground beef and zucchini skillet answers the call.

It’s savory, quick, and feels like comfort food without a lot of effort.

Why This Skillet Dinner Works

The zucchini mellows as it cooks, soaking up the beefy juices and the seasoned tomatoes. The cheese on top makes it feel indulgent, but the whole thing comes together fast enough for a Tuesday night.

I keep coming back to this one when I want something warm and filling that doesn’t ask for a pile of side dishes.

Ingredients

1 tbsp olive oil: for browning the beef; any neutral oil works
1 lb lean ground beef: 90/10 keeps it from getting greasy
1 small onion, diced: yellow or white onion both work
3 cloves garlic, minced: fresh gives the best kick
2 medium zucchini, diced (about 3 cups): no need to peel
1 can (14.5 oz) diced tomatoes, undrained: fire-roasted add a nice smoky note
1 tsp Italian seasoning: or a mix of dried oregano and basil
1/2 tsp salt: adjust to taste after adding the cheese
1/4 tsp black pepper
1 cup shredded sharp cheddar cheese: freshly grated melts smoothest
Fresh parsley, chopped: optional, for a little color at the end

Variations / Substitutions

Ground turkey or chicken: swap in a lean ground poultry; add a drizzle of extra oil if the meat is very lean so it doesn’t dry out
Mushrooms: sauté 8 oz sliced cremini mushrooms with the onion for extra savory depth
Dairy-free: use a plant-based cheddar shred that melts well; the dish won’t be quite as creamy but still satisfying
Spicy kick: stir in 1/4 tsp red pepper flakes with the tomatoes, or use pepper jack cheese instead of cheddar
More veggies: a handful of fresh spinach or chopped bell pepper can be added when you stir in the tomatoes

For a different spin, try my Ground Beef and Cabbage Stir-Fry.

How To Make Easy One-Pan Cheesy Ground Beef and Zucchini Skillet

Step 1: Brown the Beef

Set a large skillet over medium-high heat and add the olive oil. Once it shimmers, crumble in the ground beef and cook for about 5 to 7 minutes, breaking it up with a spatula, until no pink remains.

The beef will release some liquid at first, then start to sizzle and pick up brown bits on the bottom of the pan. That browning is where the flavor lives, so don’t rush it.

Step 2: Sauté the Aromatics and Zucchini

Stir the diced onion and garlic into the beef and cook until the onion turns translucent, about 2 minutes. Add the diced zucchini and cook for another 3 to 4 minutes, stirring now and then, just until the zucchini starts to soften at the edges but still has a little bite.

Keep the heat at medium-high so the zucchini sizzles rather than steams. You want it to take on a little color without turning mushy.

Step 3: Simmer with the Tomatoes

Pour in the can of diced tomatoes with all their juices, then add the Italian seasoning, salt, and pepper. Give everything a good stir, lower the heat to medium, and let it simmer for about 5 minutes, until the mixture thickens slightly and the zucchini is tender.

The sauce should reduce just enough to cling to the beef and zucchini. It’ll look glossy and smell like a deep, herby tomato sauce.

Step 4: Melt the Cheese and Serve

Turn the heat to low and sprinkle the shredded cheddar evenly over the skillet. Cover the pan with a lid or a sheet of foil and let the cheese melt for 2 to 3 minutes, just until it’s bubbly and gooey. Remove the lid, scatter chopped parsley over the top if you like, and serve the skillet right at the table.

The cheese should be fully melted but still creamy, not browned or oily from too much heat. Scoop it straight from the pan and enjoy.

Tips for the Best Skillet

Opt for freshly grated cheese; the anti-caking agents on pre-shredded cheese can make it melt grainy instead of smooth.
If your skillet feels crowded, sauté the zucchini in two batches so it sears instead of steaming. A 12-inch pan gives everything enough room.
Lean ground beef (90% or leaner) keeps the dish from becoming greasy, but if you use 80/20, spoon off most of the fat after browning before adding the onion and zucchini.
Don’t let the cheese sit on high heat once it’s melted; carryover heat will keep it warm, and prolonged heat can cause the cheese to separate.

Storing Leftovers

Refrigerate: cool the skillet completely, then store leftovers in an airtight container for up to 3 days.
Reheating: warm gently in a skillet over medium-low heat with a splash of water, or microwave in short bursts until hot. The zucchini will soften further, but the flavor stays strong.

What To Serve With This Skillet

A crusty loaf of bread for scooping up the saucy bits is an easy win. A simple green salad with a lemon vinaigrette cuts through the richness of the cheese and beef. For a heartier meal, spoon the skillet over cooked rice or buttered egg noodles.

Frequently Asked Questions

Can I use ground turkey instead?

Yes. Ground turkey works well; just add a little extra olive oil when browning if the turkey is very lean so it doesn’t dry out.

My zucchini turned out watery. What went wrong?

Zucchini releases moisture as it cooks, but the simmer step with the tomatoes allows that liquid to evaporate and thicken. If your skillet is overcrowded, the steam gets trapped instead of reducing, so use a wide pan.

How do I reheat this without the cheese getting rubbery?

Add a tablespoon or two of water to the skillet when you reheat it over low heat, and cover the pan. The steam will remelt the cheese gently without making it tough.

Can I add pasta to this skillet?

Yes. Cook 8 oz of short pasta separately, then stir it in after the cheese has melted. You might need an extra splash of broth or tomato sauce to keep it from getting dry.