Crockpot Parmesan Kielbasa Alfredo Penne Step-by-step instructions

Before you start

Before starting, slice the smoked kielbasa into 1/2-inch medallions. If you want to deepen the flavor, you can quickly brown the kielbasa in a skillet over medium-high heat for 3 to 4 minutes, but this is optional.

Measure out the penne pasta, broccoli florets, and Alfredo sauce. Grate the Parmigiano-Reggiano if you’re using a wedge. Have all your ingredients ready to layer into the slow cooker.

Instructions

Layer and Top

1. 1Layer the Ingredients
   Place the sliced smoked kielbasa medallions in an even layer at the bottom of a 6-quart slow cooker. Add the dry penne pasta and fresh broccoli florets on top. Pour the Alfredo sauce over the entire mixture, making sure to cover as much of the pasta and broccoli as possible.
   Look for The slow cooker should be about two-thirds full, with the sauce coating the top.
   Tip If the kielbasa is very salty, you can quickly sear it in a skillet first to deepen the flavor and render some fat.
2. 2Top with Cheeses
   Sprinkle the shredded Italian four-cheese blend evenly over the top of the mixture, then finish with the freshly grated Parmigiano-Reggiano. Do not stir; the cheeses will melt and form a golden crust as the slow cooker works.
   Look for The top should be completely covered with the cheese mixture.
   Tip Grate the Parmesan fresh from a wedge for the best melting and flavor.

After this phase, the slow cooker contains an even layer of kielbasa, penne, broccoli, and Alfredo sauce, topped with a generous blanket of shredded Italian cheese and grated Parmesan. The colors are vibrant—green broccoli, golden cheese, and rosy kielbasa. The sauce should be visible around the edges. Everything is ready to cook.

Slow Cook and Blend

3. 3Slow Cook
   Cover the slow cooker and cook on LOW for 3 to 4 hours, or on HIGH for 1 1/2 to 2 hours, until the pasta is tender and the sauce is bubbly. Avoid opening the lid during the first 2 hours to keep the heat steady.
   Look for The sauce will be bubbling around the edges and the cheese will be melted and lightly golden.
   Tip If the pasta seems too al dente after the suggested time, continue cooking in 30-minute increments.
4. 4Stir and Check
   Once the pasta is tender, gently stir the mixture to combine the melted cheese into the sauce. Taste and adjust with salt and pepper if needed. If the sauce seems too thick, stir in a splash of warm water or milk to reach the desired consistency.
   Look for The sauce should be creamy and coat the pasta evenly.
   Tip Be careful not to over-stir, which can break up the pasta.

At the end of this phase, the sauce is bubbling gently around the edges, and the cheese has melted into a smooth, golden layer. The kitchen smells of garlic, Parmesan, and smoked sausage.

The pasta is tender and the broccoli is cooked but still bright green. Stirring will incorporate the cheese into the sauce, creating a creamy, cohesive dish.

Serve and Enjoy

5. 5Serve
   Spoon the hot pasta into bowls or onto plates. Garnish with extra grated Parmesan and freshly cracked black pepper if desired. Serve immediately while the cheese is still stretchy and the sauce is hot.
   Look for The dish should be steaming and the cheese pulls in long strands when lifted.
   Tip For a pretty presentation, serve in shallow bowls to show off the creamy sauce.

The finished dish is creamy, cheesy, and steaming hot. Each spoonful lifts stretchy strands of melted cheese. The kielbasa is caramelized at the edges, and the penne is coated in a velvety Alfredo sauce with flecks of broccoli. Serve immediately for the best texture and flavor.

Common mistakes

One common mistake is lifting the lid too often during cooking, which lets heat escape and increases the cooking time. Another is using too much liquid; the Alfredo sauce should be enough to cook the pasta, but if it looks dry, add a splash of water or broth.

Over-stirring can break the pasta and make the sauce gummy. Also, be careful not to overcook the pasta—check it at the minimum time and adjust.

How to tell it’s done

The pasta is done when it is tender but still holds its shape—al dente. The sauce should be bubbly and slightly thickened, and the cheese on top should be melted and lightly golden.

If you have a food thermometer, the internal temperature of the dish should reach at least 165°F (74°C) if you want to be extra safe, though the kielbasa is already cooked. The dish is ready when everything is heated through and the pasta is cooked to your liking.