Step 1: Cook the Pasta

1. Bring a large pot of salted water to a boil. Cook the pasta according to the package instructions until al dente. Reserve 1 cup of pasta water, then drain the rest and set the pasta aside.

Step 2: Prepare the Garlic Butter Base

1. In a large skillet, heat the olive oil and butter over medium heat until the butter is melted.
2. Add the minced garlic and sauté for 1–2 minutes, stirring constantly, until fragrant but not browned.

Step 3: Make the Sauce

1. Lower the heat and pour in the heavy cream. Stir well to combine with the garlic butter mixture.
2. Gradually whisk in the Parmesan cheese until it melts and the sauce is smooth and creamy.
3. Season with salt, black pepper, and red pepper flakes, if using.

Step 4: Combine the Pasta and Sauce

1. Add the cooked pasta to the skillet, tossing gently to coat every strand in the sauce.
2. If the sauce is too thick, add the reserved pasta water, a little at a time, until the desired consistency is reached.

Step 5: Garnish and Serve

1. Transfer the pasta to a serving dish or individual plates. Garnish with additional Parmesan cheese and fresh parsley, if desired.
2. Serve immediately with garlic bread or a side salad for a complete meal.