Grinch Spaghetti (Green Pesto Pasta for Christmas)

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Grinch Spaghetti turns an ordinary weeknight pasta into a full-on Christmas event. A vivid basil-and-spinach pesto coats every strand of spaghetti in bright holiday green, and with a few festive garnishes — ruby-red cherry tomatoes, a sprinkle of parmesan, and one small heart on top — the plate looks exactly like the Grinch's heart growing three sizes. Kids go wild for the color, and adults get a genuinely good pesto dinner underneath all the fun.

The sauce is the real hero here. Fresh basil brings that classic pesto flavor, baby spinach boosts the green color without changing the taste, and pine nuts, parmesan, and garlic keep it rich and savory. A little starchy pasta water blended in at the end makes the sauce cling to the spaghetti like a proper coating rather than sliding off. From start to finish it takes about 30 minutes, and most of that is just boiling water.

This is the kind of recipe that solves two holiday problems at once: a crowd-pleasing dinner the night before Christmas, and a dish that photographs beautifully for the holiday table. No food coloring, no gimmicks — just green vegetables doing what they do best.

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Ingredients

For the green pesto sauce

• 2 cups (60 g) packed fresh basil leaves
• 2 cups (60 g) packed baby spinach leaves
• 1/3 cup (45 g) pine nuts, lightly toasted
• 1/2 cup (50 g) freshly grated Parmesan cheese, plus extra for serving
• 2 medium garlic cloves, peeled
• 1 tablespoon fresh lemon juice
• 1/2 teaspoon fine sea salt, plus more to taste
• 1/4 teaspoon freshly ground black pepper
• 1/2 cup (120 ml) extra-virgin olive oil

For the spaghetti

• 12 oz (340 g) spaghetti (heart-shaped spaghetti works too, if you can find it)
• 1 tablespoon fine sea salt, for the pasta water
• 1/2 cup (120 ml) reserved pasta water, as needed

For the festive garnishes

• 1 cup (150 g) cherry tomatoes, halved or left whole
• 1/4 cup (25 g) freshly grated Parmesan cheese
• Fresh basil leaves, for scattering
• 1 small red bell pepper or a slice of roasted red pepper, cut into 1 or 2 small hearts for the "Grinch heart" garnish

Choosing your greens

Fresh basil is non-negotiable for real pesto flavor — dried basil will not give you the right taste or color. The spinach is there mainly for color and volume: it keeps the sauce bright green even after it sits, and its mild flavor disappears into the basil and garlic. Wash and thoroughly dry both greens before blending; excess water will thin the sauce and dull the color. If pine nuts are too pricey, raw walnuts or sunflower seeds work in equal measure and keep the texture creamy.

Instructions

1. Bring the pasta water to a boil. Fill a large pot with about 4 quarts of water, add the tablespoon of salt, and bring it to a rolling boil over high heat. Salting the water generously is what seasons the pasta itself, and the starchy water you will reserve later is a key sauce ingredient.
2. Toast the pine nuts. While the water heats, place the pine nuts in a small dry skillet over medium heat. Toast, shaking the pan often, for 2 to 3 minutes, until lightly golden and fragrant. Remove them from the pan immediately so they do not scorch — burnt nuts will turn the whole sauce bitter.
3. Blend the green sauce. In a food processor, combine the basil, spinach, toasted pine nuts, Parmesan, garlic, lemon juice, salt, and pepper. Pulse several times to break everything down, scraping down the sides once. With the processor running, drizzle in the olive oil in a slow, steady stream until the sauce is smooth and vividly green. Taste and adjust the salt. If the sauce looks thick, that is fine — the pasta water will loosen it later.
4. Cook the spaghetti. Add the spaghetti to the boiling water and cook according to the package directions until just al dente — about 1 minute less than the box suggests. Before draining, scoop out at least 1/2 cup of the starchy cooking water into a measuring cup. Drain the pasta well but do not rinse it; the starch on the surface helps the sauce cling.

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5. Toss the pasta with the sauce. Return the drained spaghetti to the empty warm pot or a large skillet over low heat. Add about three-quarters of the green sauce and toss with tongs, adding splashes of the reserved pasta water a little at a time. The goal is a glossy, even coating on every strand — the starch in the water emulsifies with the olive oil into a silky sauce that hugs the pasta instead of pooling at the bottom.
6. Adjust and brighten. Taste a strand. Add the remaining sauce if you want a deeper green and stronger flavor, another pinch of salt if needed, and a few drops of lemon juice if the sauce tastes flat. The lemon keeps the green vivid and lifts the richness — do not skip the tasting step here, because salt and lemon are what turn a good pesto into a great one.
7. Plate in nests. Twirl portions of spaghetti into tall nests using tongs and a ladle, and set each nest into a warm white bowl. Nests look far more festive than scooped piles, and they hold the garnishes nicely on top.
8. Garnish like the Grinch's Christmas. Scatter the cherry tomatoes around each bowl for the red-and-green Christmas contrast, shower with extra Parmesan, and tuck in a few fresh basil leaves. Finish each bowl with one small red pepper heart on top — the Grinch's heart, grown three sizes — and serve immediately while the pasta is hot.

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Variations

• Creamy Grinch spaghetti. Stir 1/4 cup (60 ml) of heavy cream or 3 tablespoons of cream cheese into the finished sauce for a richer, more indulgent coating that kids especially love.
• Chicken Grinch spaghetti. Add 2 cups of sliced cooked chicken breast (from a rotisserie chicken works perfectly) when tossing the pasta, for a heartier main dish.
• Shrimp Grinch spaghetti. Sauté 1 pound of peeled shrimp in olive oil with a pinch of salt for 2 to 3 minutes per side and lay them over each plated nest.
• Nut-free Grinch spaghetti. Swap the pine nuts for 1/3 cup of sunflower seeds or simply leave the nuts out and add an extra tablespoon of olive oil — the sauce stays creamy and green.
• Vegan Grinch spaghetti. Replace the Parmesan with 1/4 cup of nutritional yeast plus an extra pinch of salt. The sauce keeps its bright color and savory depth without any dairy.
• Extra veggie Grinch spaghetti. Toss in a handful of thawed frozen peas or sautéed zucchini ribbons with the pasta for more green and a serving of vegetables that blends right into the theme.

Storage

Leftover Grinch spaghetti keeps in an airtight container in the refrigerator for up to 3 days. The green color will darken slightly overnight — that is normal oxidation, and a squeeze of lemon juice when reheating helps brighten it back up. Reheat gently in a skillet over low heat with a splash of water or olive oil, tossing until just warmed through; the microwave works too, but reheat in 30-second bursts and stir between them to avoid hot spots.

The pesto sauce itself can be made up to 3 days ahead: store it in a jar with a thin layer of olive oil poured over the surface (this blocks air and preserves the green color) and refrigerate. It also freezes beautifully — freeze in ice cube trays, transfer the cubes to a freezer bag, and keep for up to 3 months. Thaw cubes in the refrigerator overnight before tossing with fresh pasta.

Nutrition

Estimated per serving (recipe makes 4 servings, about 1 1/2 cups each):

• Calories: 620
• Total Fat: 34 g
• Saturated Fat: 7 g
• Cholesterol: 18 mg
• Sodium: 620 mg
• Total Carbohydrates: 66 g
• Dietary Fiber: 5 g
• Total Sugars: 4 g
• Protein: 17 g

Nutrition values are estimates calculated from the listed ingredients and will vary with exact portion size, cheese brand, and how much pasta water is used.

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Emma Carter

Hi, I’m Emma! I’m the cook and recipe developer behind Sizzle & Sage. From my sunny home kitchen, I share easy, flavor-packed recipes for real life — quick breakfasts, cozy weeknight dinners, and simple bakes anyone can make. Pull up a chair and stay a while!