Prepare the ingredients: Make sure to have all ingredients ready. Clean and slice the 8 oz white mushrooms, and mince the 2 cloves garlic.
Heat the skillet: In a large skillet, heat 2 tbsp butter and 1 tbsp olive oil over medium-high heat until shimmering.
Sauté mushrooms and garlic: Add the prepared mushrooms to the skillet, sautéing until tender, about 5-7 minutes. In the last minute of cooking, add the minced garlic and sauté until fragrant.
Add the creamy ingredients: Reduce the heat to medium and pour in 1/2 cup heavy cream, followed by 1/4 cup grated parmesan cheese and 2 oz cream cheese. Stir well to combine, allowing the cheeses to melt into the cream.
Season and thicken: Sprinkle in 1 tsp dried Italian seasoning, 1/2 tsp salt, and 1/4 tsp pepper. Keep stirring the mixture until it becomes bubbly and smooth, ensuring a nice, thick sauce.
Garnish and serve: Remove from heat and serve immediately, garnished with fresh chopped parsley for a touch of color and flavor.