My aunt brought these to every family gathering for 20 years and nobody knew how simple they were until she finally let it slip at Thanksgiving.

These oven baked 4-ingredient cream cheese stuffed mushrooms are the definition of deceptively simple. My aunt has brought a big white casserole dish of these to every family gathering for the last 20 years, and everyone always assumed there was some secret, complicated filling involved. One Thanksgiving she finally admitted it was just cream cheese, a pantry seasoning blend, and a little butter—and we all just stared at her. They’re perfect for busy weeknights, holiday appetizers, or anytime you want something that looks impressive but comes together fast with almost no cleanup.

Serve these stuffed mushrooms hot, straight from the oven, in the same white casserole dish they baked in—no need to fuss with extra platters. They pair well with a simple green salad, roast chicken, or a bowl of pasta if you want to turn them into more of a meal. For parties, I like to set them out with toothpicks, a bowl of olives, and a cheese board so people can graze. A crisp white wine, light beer, or sparkling water with lemon works really well alongside the rich, creamy filling.

Servings: 6-8

24 medium white button or cremini mushrooms (about 1 1/2 pounds), stems removed

Preheat your oven to 400°F (200°C). Lightly grease a white casserole dish with a tiny bit of the melted butter or a quick spritz of cooking spray so the mushrooms don’t stick.

Clean the mushrooms by wiping them gently with a damp paper towel to remove any dirt. Twist and pull out the stems and set the mushroom caps aside in a bowl. Finely chop the stems if you want to use them in the filling, or save them for another recipe like omelets or stir-fries.

In a medium mixing bowl, add the softened cream cheese, melted butter, and garlic and herb seasoning blend. If you’re using the chopped mushroom stems, stir those in as well. Mix with a spoon or spatula until everything is completely smooth and evenly combined. Taste a tiny bit and adjust seasoning if needed.

Arrange the mushroom caps in a single layer in the greased casserole dish, open side up like little cups. If any caps are wobbly, gently trim the bottom with a knife so they sit flat.

Using a small spoon or a piping bag, generously fill each mushroom cap with the cream cheese mixture, mounding it slightly over the top. Don’t be shy—this is where that pretty, creamy look comes from once they bake.

Place the casserole dish on the middle rack of the preheated oven. Bake for 18–22 minutes, or until the mushrooms are tender, the cream cheese filling is hot and bubbly, and the tops are lightly golden brown. If you want extra browning on top, switch the oven to broil for 1–2 minutes at the end, watching closely so they don’t burn.

Carefully remove the dish from the oven and let the mushrooms rest for about 5 minutes. The filling will be very hot and will firm up slightly as it cools, which makes them easier to pick up and eat.

Serve the stuffed mushrooms directly from the casserole dish while still warm. If you’re taking them to a gathering like my aunt always did, cover the dish with foil for transport and rewarm in a 350°F (175°C) oven for 5–10 minutes just before serving.

To change up the flavor while still keeping things easy, you can swap the garlic and herb seasoning for ranch seasoning, Italian seasoning, or a Cajun blend—just adjust the amount if your mix is extra salty. For a little color and texture, sprinkle a pinch of paprika or dried parsley over the tops before baking. If you don’t mind technically adding a fifth ingredient, a tablespoon or two of grated Parmesan or shredded mozzarella over the filled mushrooms will give you extra golden, cheesy tops. You can also use low-fat cream cheese if you prefer, but the filling will be slightly less rich and a bit softer. For meal prep, you can stuff the mushrooms up to a day ahead, cover the dish tightly, and refrigerate; add 2–3 extra minutes to the baking time if going straight from the fridge. Food safety tips: Always start with fresh, firm mushrooms and check for any slimy or off-smelling ones and discard them. Keep cream cheese refrigerated until you’re ready to soften it (you can let it sit at room temperature for about 30–45 minutes before mixing). Don’t leave the baked mushrooms out at room temperature for more than 2 hours; refrigerate leftovers in a covered container and reheat thoroughly in the oven before eating. Avoid reheating multiple times, and discard leftovers after 3–4 days.