Gather all ingredients.
Bring a large pot of lightly salted water to a boil. Add fettuccine pasta and cook for 8 to 10 minutes or until al dente; drain.
Melt butter into cream in a large saucepan over low heat; add salt, pepper, and garlic salt.
Increase the heat to medium; stir in grated Romano and Parmesan cheese until melted and sauce has thickened.
Add cooked pasta to sauce and toss until thoroughly coated; serve immediately.