Mushroom Shrimp Alfredo Pasta

Ingredients (12)

• + 1 (16 ounce) box dry fettuccine pasta add to pantry
• + 1 pint heavy whipping cream add to pantry
• ✓ 1 ¼ cups butter, divided
• + ¾ cup grated Romano cheese add to pantry
• ✓ ½ cup grated Parmesan cheese
• ✓ 3 cloves garlic, crushed, divided
• + salt and ground black pepper to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• + 2 tablespoons olive oil add to pantry
• + 1 large onion, chopped add to pantry
• + 8 ounces diced mushrooms add to pantry
• + 1 (8 ounce) package frozen shrimp, deveined and tails removed, thawed add to pantry