In a skillet over medium heat, add olive oil or butter and heat until shimmering. Add the sliced mushrooms and sauté for 8-10 minutes until browned and tender.

Stir in the minced garlic and cook for an additional minute until fragrant, stirring constantly.

Reduce heat and add the softened cream cheese and sour cream. Stir until melted and blended, creating a smooth mixture.

Mix in half of the shredded mozzarella and all of the grated Parmesan cheese. Stir until smooth and cohesive. Season with salt and black pepper.

Transfer the skillet to a preheated oven at 375°F. Sprinkle remaining mozzarella on top and bake for 15-20 minutes until bubbly and golden brown.

Garnish with fresh thyme or parsley and serve hot alongside toasted baguette slices, crackers, or vegetable sticks.