Delicious Mushroom Alfredo

I looked everywhere for a good mushroom alfredo. I used to saute the mushrooms and add them in, but they just weren't as good as I hoped. After some experimentation I came up with this recipe for my Mother-in-Law's birthday party and it was unbelievable. Everyone loved it! I served it over tortellini, but generally I'll just serve it over wheat pasta noodles.

• Ready In: 30 mins
• Serves: 6-8

Ingredients

• 1⁄2 cup sweet butter (halved)
• 2  cups portabella mushrooms or 2  cups cremini mushrooms
• 2 -3  garlic cloves, minced
• 1  small  white onion (optional)
• 4  cups heavy cream
• 1⁄4 teaspoon white pepper
• 1⁄2 cup  grated parmesan cheese
• 1  cup mozzarella cheese
• 16  ounces  thin spaghetti noodles (optional)

Directions

1. Melt half the butter in medium saucepan over medium/low heat.
2. Add the garlic, onion, and mushroom and sauté until the liquid is released. 5-7 minutes.
3. Add the remaining butter, cream, and white pepper and bring mixture to a simmer.
4. Stir often.
5. Begin your noodles or tortellini at this point so everything will be done at the same time.
6. Add the Mozzarella cheese and simmer sauce for 8-10 minutes or until sauce has thickened and is smooth, stirring constantly.
7. When sauce has thickened add the Parmesan cheese and stir frequently until smooth. Remove from heat when sauce has reached desired consistency.