Start by adding the broth to the Instant Pot. Place the fettuccine noodles in the pot, laying them flat. If they don’t fit, feel free to break them in half to make them manageable.
Add the crushed red pepper flakes, onion powder, and a pinch of salt and pepper to the pot. Stir gently to combine the ingredients, ensuring the noodles are submerged in the broth.
Close the lid of the Instant Pot securely, making sure the vent is set to the sealing position. Select the Manual or Pressure Cook setting and set the timer for 4 minutes.
Once the cooking time is up, allow the pressure to naturally release for 2 minutes, then carefully turn the vent to venting to release any remaining pressure.
Carefully open the lid, and stir the noodles. Add the minced garlic and unsalted butter, mixing well until the butter melts and blends throughout the noodles.
Gradually add the grated Parmesan cheese, stirring continuously until it melts and creates a creamy sauce.
Taste the noodles and adjust seasoning with additional salt and pepper if needed.
Serve immediately, garnished with freshly chopped parsley for a burst of color and flavor.
Notes
Adjust the crushed red pepper flakes to taste for desired spiciness.