Garlic Stuffed Mushrooms Easy to make, quick to bake. By Guest Contributor January 7, 2013 Snack Preparation Time Cook Time Servings0IngredientsLarge flat mushrooms (as many as you want)garlic buttermozzarellacheddarInstructions Step 1: Pre-heat oven to 200c Step 2: place to mushrooms head up on a tray, and oven cook for 10minutes. Step 3: turn the mushrooms over, and spread on the garlic butter. Step 4: put as much cheese on as you wish, then pop back in the oven till the cheese has melted. Step 5: really quick and easy to do, cheap, and tastes amazing too!