Quick Recipe Version (TL;DR)
Quick Ingredients
- 1 lb (454 g) broccoli florets
- 2 tbsp olive oil
- 1 tsp kosher salt, divided
- 1/2 tsp crushed red pepper flakes (optional)
- 12 oz (340 g) fettuccine
- 1 lb (454 g) boneless, skinless chicken breasts, cut into 1-inch pieces
- 1/2 tsp garlic powder
- 1/2 tsp freshly ground black pepper, plus more to finish
- 3 tbsp unsalted butter
- 5 cloves garlic, minced
- 1 1/2 cups (360 ml) heavy cream
- 1/2 cup (120 ml) reserved pasta water (as needed)
- 1 1/2 cups (150 g) finely grated Parmesan cheese, plus shaved Parmesan to finish
- 1 tsp lemon zest (optional, brightens the sauce)
Do This
- 1. Roast broccoli at 425°F (220°C) for 18–22 minutes with olive oil, salt, and optional pepper flakes.
- 2. Boil fettuccine in salted water until al dente; reserve 1 cup pasta water, then drain.
- 3. Season chicken with salt, garlic powder, and pepper; sauté until cooked through, then set aside.
- 4. In the same pan, melt butter; cook garlic for 30–45 seconds.
- 5. Add cream; gently simmer 3–5 minutes, then whisk in Parmesan until smooth.
- 6. Toss in fettuccine, chicken, and roasted broccoli; loosen with reserved pasta water as needed.
- 7. Finish with cracked black pepper and extra shaved Parmesan; serve immediately.
Why You’ll Love This Recipe
- Restaurant-style creaminess from a true Parmesan-garlic Alfredo sauce (no shortcuts required).
- Roasted broccoli adds caramelized edges and keeps the dish from feeling heavy.
- One main pan for the sauce and chicken, plus a pasta pot and a sheet pan.
- Reliable and flexible: easy to scale up, swap proteins, or add extra veggies.
Grocery List
- Produce: broccoli florets (about 1 lb), garlic (1 head), lemon (optional)
- Dairy: unsalted butter, heavy cream, Parmesan cheese (block for grating + shaving)
- Pantry: fettuccine, olive oil, kosher salt, black pepper, garlic powder, crushed red pepper flakes (optional)
Full Ingredients
Roasted Broccoli
- 1 lb (454 g) broccoli florets (bite-size, similar thickness for even roasting)
- 2 tbsp olive oil
- 1/2 tsp kosher salt
- 1/2 tsp crushed red pepper flakes (optional)
Pasta
- 12 oz (340 g) fettuccine
- 1 tbsp kosher salt (for the pasta water)
Chicken
- 1 lb (454 g) boneless, skinless chicken breasts, cut into 1-inch pieces
- 1/2 tsp kosher salt
- 1/2 tsp garlic powder
- 1/2 tsp freshly ground black pepper
- 1 tbsp olive oil (for sautéing)
Parmesan-Garlic Cream Sauce
- 3 tbsp unsalted butter
- 5 cloves garlic, minced
- 1 1/2 cups (360 ml) heavy cream
- 1 1/2 cups (150 g) finely grated Parmesan cheese, plus 1/2 cup (about 25–40 g) shaved Parmesan for finishing
- 1/2 cup (120 ml) reserved pasta water, plus more as needed
- 1 tsp lemon zest (optional, but excellent for balance)
- Freshly cracked black pepper, to finish
Step-by-Step Instructions
Step 1: Roast the broccoli until caramelized
Preheat the oven to 425°F (220°C). Line a rimmed sheet pan with parchment paper (optional, but it helps with cleanup).
Toss the broccoli florets with 2 tbsp olive oil, 1/2 tsp kosher salt, and 1/2 tsp red pepper flakes (if using). Spread into a single layer so the florets roast instead of steam.
Roast for 18–22 minutes, flipping once halfway through, until the edges are browned and crisp-tender. Set aside.
Step 2: Boil the fettuccine and reserve pasta water
Bring a large pot of water to a boil. Add 1 tbsp kosher salt.
Add the fettuccine and cook until al dente according to package directions (typically 10–12 minutes). Before draining, carefully reserve 1 cup (240 ml) of the starchy pasta water. Drain the pasta (do not rinse).
Step 3: Season and sauté the chicken
While the pasta cooks, season the chicken pieces with 1/2 tsp kosher salt, 1/2 tsp garlic powder, and 1/2 tsp black pepper.
Heat 1 tbsp olive oil in a large, heavy skillet (12-inch is ideal) over medium-high heat. Add chicken in a single layer and cook for 6–8 minutes, stirring occasionally, until browned and cooked through to 165°F (74°C).
Transfer the chicken to a plate and keep warm. If there are browned bits in the pan, keep them there (they add flavor).
Step 4: Build the garlic-butter base for the sauce
Reduce the heat to medium. Add 3 tbsp butter to the same skillet. Once melted, add the minced garlic and cook for 30–45 seconds, stirring constantly, just until fragrant.
Keep the garlic moving and don’t let it brown; browned garlic can make the sauce taste bitter.
Step 5: Simmer the cream, then melt in Parmesan until silky
Pour in 1 1/2 cups (360 ml) heavy cream. Bring to a gentle simmer over medium to medium-low heat and cook for 3–5 minutes, stirring often, until slightly thickened.
Turn the heat to low. Gradually whisk in the finely grated Parmesan, a handful at a time, until fully melted and smooth. If using, whisk in 1 tsp lemon zest for a fresh, balanced finish.
If the sauce seems too thick, whisk in 2–4 tbsp reserved pasta water at a time until it looks glossy and coats the back of a spoon.
Step 6: Toss pasta, chicken, and roasted broccoli in the sauce
Add the drained fettuccine to the skillet and toss until every strand is coated. Add the cooked chicken and the roasted broccoli, then toss again.
Adjust the consistency with more reserved pasta water as needed (typically 1/4 to 1/2 cup total). The sauce should look creamy and clingy, not tight or pasty.
Step 7: Finish with cracked pepper and shaved Parmesan
Remove from heat. Taste and adjust seasoning (Parmesan is salty, so you may not need extra salt). Finish generously with freshly cracked black pepper and a snowfall of shaved Parmesan.
Serve immediately while the sauce is at its creamiest.
Pro Tips
- Grate your own Parmesan (fine microplane-style). Pre-shredded cheese often contains anti-caking agents that can make the sauce grainy.
- Keep the heat low when adding cheese. High heat can cause Parmesan to clump or turn gritty.
- Use pasta water strategically: it loosens the sauce while keeping it creamy and glossy. Add a splash at a time.
- Roast, don’t steam, the broccoli. High-heat roasting concentrates flavor and keeps florets from getting watery in the sauce.
- Slice chicken evenly for quick, juicy cooking. If pieces vary, the small ones overcook before the large ones are done.
Variations
- Lighter Alfredo: Use 1 cup (240 ml) heavy cream plus 1/2 cup (120 ml) whole milk. The sauce will be slightly less rich but still creamy.
- Swap the protein: Replace chicken with 1 lb (454 g) shrimp (cook 2–3 minutes per side) or add 6 slices cooked bacon, crumbled.
- Add more greens: Stir in 3 cups (90 g) baby spinach at the very end until just wilted, or add sautéed mushrooms for a deeper savory flavor.
Storage & Make-Ahead
Store leftovers in an airtight container in the refrigerator for up to 3 days. Alfredo sauce thickens as it chills, so reheat gently in a skillet over low heat with a splash of milk, cream, or water (about 1–3 tbsp per serving), stirring until creamy again. Avoid high heat or the sauce can split. For make-ahead: roast the broccoli up to 2 days in advance and refrigerate; you can also cut and season the chicken up to 24 hours ahead. Cook pasta and make the sauce right before serving for the best texture.
Nutrition (per serving)
Approximate, based on 4 servings: Calories: 860 kcal; Protein: 49 g; Carbohydrates: 67 g; Fat: 45 g; Saturated Fat: 25 g; Fiber: 5 g; Sugars: 4 g; Sodium: 980 mg.
