Name: Simple Mushroom Penne with Walnut Pesto Recipe
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: Italian
Ingredients: 8 ounces penne pasta; 4 tablespoons butter; 16 ounces fresh sliced mushrooms; 1/4 cup grated or shaved Parmesan cheese; Salt and pepper, to taste; 1/4 cup fresh parsley, for topping; 1 cup walnuts; 1 1/2 cups packed greens (spinach or basil); 1/2 to 3/4 cup shredded Parmesan cheese; 1/4 cup olive oil; 1 clove garlic; Juice of 1 lemon; Salt and pepper, to taste

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I’m so excited to share this Simple Mushroom Penne with Walnut Pesto Recipe with you. It’s one of those dishes that feels both comforting and gourmet at the same time, packed with rich, earthy mushrooms and a vibrant, nutty pesto that really brings everything together. Cooking this pasta makes me feel like I’m treating myself and my loved ones to something truly special without spending ages in the kitchen. It’s straightforward, satisfying, and perfect for almost any occasion where you want a yummy, wholesome meal.

Why You’ll Love This Simple Mushroom Penne with Walnut Pesto Recipe

This recipe hits a beautiful balance of flavors that gets me every time. The mushrooms cook down to a golden, tender delight that feels deeply savory and earthy, while the walnut pesto adds a fresh, slightly tangy pop that is unlike your traditional basil pesto. I love how the walnuts give the sauce a creamy texture without needing any heavy cream, making each bite feel luscious but still light on the palate. It’s that combination of hearty yet bright flavors that keeps me coming back.

One of the best parts about this Simple Mushroom Penne with Walnut Pesto Recipe is how effortlessly it comes together. The ingredients are easy to find and simple to prepare, which means you can have a delicious meal on the table in about 40 minutes without breaking a sweat. Whether I’m cooking for a casual weeknight dinner or a small gathering with friends, this dish feels just right. It’s a great choice when you want something a little fancy but don’t have hours to fuss over dinner.

Ingredients You’ll Need

A white bowl filled with a thick, chunky green sauce that has a rough texture and small bits of herbs throughout. The green mixture looks fresh and vibrant, piled slightly in the middle with uneven swirls. A shiny metal spoon rests inside the bowl, its handle extending out towards the top right corner. The bowl sits on a white marbled surface that adds a clean, bright background. photo taken with an iphone --ar 4:5 --v 7

Let me tell you, the magic of this recipe really starts with these straightforward ingredients. Each one adds something special—texture, taste, or a touch of color—that elevates the dish without overwhelming it.

8 ounces penne pasta: I love penne here because it holds the sauce beautifully in its ridges and tubes.
4 tablespoons butter: Adds richness and helps the mushrooms get that gorgeous, golden brown finish.

16 ounces fresh sliced mushrooms: The star ingredient, delivering earthy depth and meaty texture.
1/4 cup grated or shaved Parmesan cheese: Vital for that salty, savory note that ties everything together.
Salt and pepper, to taste: Essential for seasoning and bringing the flavors to life.

1/4 cup fresh parsley: A fresh green pop that brightens up the final dish visually and in flavor.
1 cup walnuts: Perfect for toasting and creating a rich, nutty pesto base.
1 1/2 cups packed greens (spinach or basil): Adds freshness and vibrant color to the walnut pesto.

1/2 to 3/4 cup shredded Parmesan cheese: For a cheesy, savory depth in the pesto.
1/4 cup olive oil: Smooths the pesto into a luscious sauce.
1 clove garlic: Gives the pesto a subtle kick and aromatic finish.

Juice of 1 lemon: Adds brightness and balances the richness of the nuts and cheese.
Salt and pepper to taste: To season the pesto perfectly.

Directions

Step 1: Start by cooking the penne pasta according to the package directions until it’s just al dente. Drain it well and set it aside so it’s ready to join the rest of the dish.

Step 2: While the pasta cooks, toast the walnuts in a small sauté pan over low heat. Keep stirring or shaking the pan gently so they toast evenly and don’t burn. You’ll know they’re ready when they smell warm and fragrant — this usually takes about 5 minutes.

Step 3: Transfer the toasted walnuts to a food processor, then add the packed greens, shredded Parmesan, olive oil, garlic, lemon juice, salt, and pepper. Pulse everything together until the mixture becomes mostly smooth but still has a bit of texture for that lovely, rustic feel.

Step 4: Next, heat the butter in a wide skillet over medium heat. Once melted, toss in the mushrooms. Cook them for 8 to 10 minutes, stirring occasionally, until they have a deep golden brown color and have released their moisture. This step is crucial for building that deep mushroom flavor.

Step 5: Add the cooked penne pasta to the skillet with the mushrooms, stirring well to combine. Sprinkle in the Parmesan cheese and season with salt and pepper to your liking. Toss everything together so the cheese melts slightly and the flavors meld.

Step 6: At this point, you can either spoon the walnut pesto directly over each serving or stir it into the pasta to coat everything evenly. Sprinkle fresh parsley on top for a pop of color and a touch of freshness, then serve immediately.

Servings and Timing

This recipe makes about 4 to 6 servings, depending on how hungry you and your guests are (I always want seconds!). The prep time is around 10 minutes, mainly for gathering and prepping ingredients. Cooking the pasta and mushrooms combined takes roughly 25 minutes. Altogether, you’re looking at about 40 minutes from start to finish, with no extra resting or cooling time needed — perfect for a delicious, straightforward weeknight dinner.

How to Serve This Simple Mushroom Penne with Walnut Pesto Recipe

A rustic bowl holds a dish with two main layers: the bottom layer is light brown penne pasta mixed with sautéed sliced mushrooms that have a golden-brown sear and some green herb sprinkles; next to this is a thick, bright green pesto-like sauce with a coarse texture. The bowl is speckled gray ceramic with an uneven rim, placed on a white marbled surface. A silver fork rests inside the bowl, angled towards the top left. photo taken with an iphone --ar 4:5 --v 7

I love serving this dish warm, straight from the pan, when its flavors are at their peak. One of my favorite accompaniments is a fresh, crisp green salad with a bright vinaigrette, which complements the richness of the butter, mushrooms, and pesto beautifully. For some extra indulgence, roasted or grilled vegetables like asparagus or zucchini are fantastic side options and add vibrant color to the plate.

Presentation-wise, I like to serve the pasta in wide, shallow bowls to show off the beautiful golden mushrooms and vibrant green pesto. Garnishing with a little extra Parmesan and a sprinkle of fresh parsley really makes it pop visually and adds another layer of freshness with every bite. Portion-wise, I usually aim for a generous handful per person but keep some extra pesto on the side for those who want a little more zing.

For drinks, I often reach for a crisp white wine like Pinot Grigio or Sauvignon Blanc that cuts nicely through the richness. If you prefer something non-alcoholic, sparkling water with a squeeze of lemon works wonderfully to keep things light and refreshing. This meal is such a crowd-pleaser, whether it’s a laid-back family dinner, casual weekend lunch, or a small dinner party where you want to impress without fuss.

Variations

One of the reasons I adore this Simple Mushroom Penne with Walnut Pesto Recipe is how flexible it is. If you need to swap nuts, pecans or almonds also work beautifully in the pesto, each bringing their own unique flavor. For herbs, if you’re missing basil or spinach, arugula can add a peppery kick that changes things up pleasantly.

If you’re catering to dietary needs, this recipe can easily become vegan by swapping the butter for olive oil and using nutritional yeast in place of Parmesan. For a gluten-free option, just choose a gluten-free penne pasta, and you’re good to go. The mushrooms and walnut pesto carry so much flavor, the dish still feels rich and satisfying without dairy or gluten.

Feeling adventurous? I’ve tried adding sautéed shallots and a splash of white wine when cooking the mushrooms for a slightly more complex flavor profile. Alternatively, roasting the mushrooms instead of sautéing them brings a smoky depth that elevates the dish even more. Stirring the walnut pesto directly into the pasta right before serving gives a more integrated taste, while spooning it on afterward lets each person customize their bite.

Storage and Reheating

Storing Leftovers

I find it’s best to store leftover Simple Mushroom Penne with Walnut Pesto in an airtight container in the refrigerator. This keeps the pasta fresh for up to 3 days. I recommend keeping any extra walnut pesto separate if you have leftovers so the pasta doesn’t get soggy, saving that pesto punch for when you reheat.

Freezing

While you can freeze this pasta, I personally prefer fresh. If you do freeze leftovers, separate the pasta and pesto into freezer-safe containers, leaving the pesto slightly loose in case of expansion. The pasta should keep well frozen for up to 2 months. When thawing, do it overnight in the fridge for the best texture.

Reheating

The best way to reheat this dish is gently on the stove over low heat. Add a splash of water or broth and stir gently to bring back moisture and avoid drying out the mushrooms or the pasta. I avoid microwaving when possible, since it can make the pasta mushy and the mushrooms rubbery. Reheat just until warmed through, then stir in any reserved pesto to refresh the flavors before serving.

FAQs

Can I use other types of pasta for this recipe?

Absolutely! Penne works great for its shape, but you can swap in fusilli, rigatoni, or even spaghetti. Just adjust cooking time according to the pasta package instructions.

Is it necessary to toast the walnuts before making the pesto?

Toasting the walnuts really enhances their flavor by bringing out a rich, nutty aroma. You can technically skip this step, but I highly recommend it for the best taste.

Can I make the walnut pesto ahead of time?

Yes! Walnut pesto can be made up to 3 days in advance and stored in the fridge. Just keep it covered tightly and drizzle a thin layer of olive oil on top to prevent browning.

What can I substitute if I don’t have Parmesan cheese?

If you’re avoiding dairy, nutritional yeast is a great substitute for the cheesy, savory element. For others, Pecorino Romano or Asiago can work well if you want a slightly different flavor.

How can I add more protein to this dish?

You can easily boost protein by adding cooked chicken, crispy tofu, or even some white beans stirred into the pasta. This keeps the recipe flexible for different dietary preferences.

Conclusion

If you’re looking for a dish that’s at once simple and packed with rich, layered flavors, I can’t recommend this Simple Mushroom Penne with Walnut Pesto Recipe enough. It’s one of those meals that feels like a warm hug on a plate but still impresses with its freshness and depth. I hope you love making it as much as I do — happy cooking and bon appétit!