Bring a large pot of water to a boil. Melt butter in sauce pan and stir in heavy cream. Gently simmer cream until thickened about 5-7 minutes. Add pasta and shrimp to boiling water and cook for 3-4 minutes. Place 2 cooked fettuccine in a large bowl and mix with 2 cream sauce and 1/4 cup of cheese. Toss to coat and add remaining pasta, sauce and 2 cup cheese. Season with pepper. Toss again and serve immediately with extra cheese and shrimp.
Recipe Courtesy of Food Network Kitchens