In a large skillet, heat 1 tablespoon of olive oil or butter over medium heat. Once hot, add 8 ounces of sliced mushrooms and cook for about 8-10 minutes until they become browned and tender. Stir occasionally to ensure even cooking. Afterward, mix in 2 cloves of minced garlic and sauté for an additional minute until fragrant.

Reduce the heat to low and add 8 ounces of softened cream cheese and ½ cup of sour cream to the skillet with the sautéed mushrooms. Stir thoroughly to combine until the mixture is fully melted and creamy, ensuring there are no lumps. The rich base of your Stuffed Mushroom Dip is now ready!

Next, stir in half of the 1 cup of shredded mozzarella cheese and the ¼ cup of grated Parmesan cheese into the creamy mixture. Continue stirring over low heat until the cheeses are completely melted and the mixture is smooth and well blended. This step adds that luscious cheesy flavor that makes the dip irresistible.

Transfer the creamy dip mixture to a baking dish or keep it in the skillet for a rustic look. Sprinkle the remaining mozzarella cheese evenly on top. Preheat your oven to 375°F (190°C) and bake for 15-20 minutes. You'll know it's done when the dip is bubbly and the cheese is melted and lightly golden.

Once baked, remove the Stuffed Mushroom Dip from the oven and let it cool slightly. Finish with a sprinkle of fresh thyme or parsley for a pop of color and flavor. Serve immediately with toasted baguette slices, chips, or fresh vegetable sticks for a delightful appetizer everyone will love.