Keto Lemon Butter Shrimp Pasta (Zucchini Noodles) – Bright, Buttery, and Low-Carb
Zucchini noodles and shrimp make an easy weeknight dinner that tastes restaurant-worthy. The lemon butter sauce is silky, bright, and full of fresh garlic. It clings to the “zoodles” without making them soggy, and the whole dish comes together in under 30 minutes.
If you’re keeping carbs low or just want something lighter than traditional pasta, this is a satisfying swap. Simple ingredients, big flavor, happy plates.
Keto Lemon Butter Shrimp Pasta (Zucchini Noodles) - Bright, Buttery, and Low-Carb
Ingredients
Method
- Prep the zucchini noodles: Spiralize the zucchini into noodles and spread them on a clean kitchen towel. Sprinkle lightly with salt and let sit for 10 minutes. This draws out excess moisture. Gently pat dry before cooking.
- Season the shrimp: Pat the shrimp dry. Toss with a pinch of salt, black pepper, and paprika if using. Dry shrimp sear better and won’t steam in the pan.
- Warm the pan: Heat a large skillet over medium-high heat. Add 1 tablespoon of olive oil and 1 tablespoon of butter.
- Sear the shrimp: Add shrimp in a single layer. Cook 1.5–2 minutes per side until just opaque and lightly golden. Remove to a plate. Do not overcook.
- Build the sauce: Lower heat to medium. Add remaining olive oil and 2 tablespoons butter to the skillet. Stir in minced garlic and a pinch of red pepper flakes. Cook 30–45 seconds until fragrant, not browned.
- Add lemon: Zest the lemon directly into the pan, then squeeze in the juice (about 2–3 tablespoons). Whisk to combine. Taste and season with salt and pepper. If you like it silkier, whisk in the final tablespoon of butter.
- Cook the zoodles: Add the dried zucchini noodles to the pan. Toss with tongs for 2–3 minutes, just until they soften slightly but remain crisp. You want them al dente.
- Return the shrimp: Add shrimp and any juices back to the skillet. Toss to coat in the lemon butter. Warm through for 30–60 seconds.
- Finish and serve: Turn off heat. Stir in chopped parsley. Taste and adjust salt, pepper, and lemon. Plate and top with a light sprinkle of Parmesan if desired.
Why This Recipe Works
This dish relies on a few smart techniques to keep texture and flavor in balance. Zucchini noodles cook fast, so they stay tender-crisp instead of turning watery.
A quick sear on the shrimp adds a light crust, locking in moisture. The lemon butter sauce uses both butter and olive oil for richness without heaviness, plus lemon juice and zest for a clean, fresh finish. Garlic and a pinch of red pepper flakes wake everything up.
Toss it all together at the end so the zoodles soak up flavor without overcooking.
Shopping List
- Large shrimp (peeled and deveined; 1 to 1.25 pounds)
- Zucchini (4 medium; spiralized into noodles)
- Unsalted butter (4 tablespoons)
- Extra-virgin olive oil (2 tablespoons)
- Garlic (3–4 cloves, minced)
- Lemon (1 large; you’ll use zest and juice)
- Red pepper flakes (optional, to taste)
- Fresh parsley (2–3 tablespoons, chopped)
- Parmesan cheese (optional for serving; use a little for garnish)
- Sea salt and black pepper
- Paprika (optional, a pinch for shrimp)
Step-by-Step Instructions
- Prep the zucchini noodles: Spiralize the zucchini into noodles and spread them on a clean kitchen towel. Sprinkle lightly with salt and let sit for 10 minutes. This draws out excess moisture.
Gently pat dry before cooking.
- Season the shrimp: Pat the shrimp dry. Toss with a pinch of salt, black pepper, and paprika if using. Dry shrimp sear better and won’t steam in the pan.
- Warm the pan: Heat a large skillet over medium-high heat.
Add 1 tablespoon of olive oil and 1 tablespoon of butter.
- Sear the shrimp: Add shrimp in a single layer. Cook 1.5–2 minutes per side until just opaque and lightly golden. Remove to a plate.
Do not overcook.
- Build the sauce: Lower heat to medium. Add remaining olive oil and 2 tablespoons butter to the skillet. Stir in minced garlic and a pinch of red pepper flakes.
Cook 30–45 seconds until fragrant, not browned.
- Add lemon: Zest the lemon directly into the pan, then squeeze in the juice (about 2–3 tablespoons). Whisk to combine. Taste and season with salt and pepper.
If you like it silkier, whisk in the final tablespoon of butter.
- Cook the zoodles: Add the dried zucchini noodles to the pan. Toss with tongs for 2–3 minutes, just until they soften slightly but remain crisp. You want them al dente.
- Return the shrimp: Add shrimp and any juices back to the skillet.
Toss to coat in the lemon butter. Warm through for 30–60 seconds.
- Finish and serve: Turn off heat. Stir in chopped parsley.
Taste and adjust salt, pepper, and lemon. Plate and top with a light sprinkle of Parmesan if desired.
How to Store
Store leftovers in an airtight container in the fridge for up to 2 days. Zucchini noodles release moisture as they sit, so expect a little extra liquid.
Reheat gently in a skillet over medium-low heat to keep the shrimp tender. If the sauce thins out, add a small knob of butter and a squeeze of lemon to bring it back together. It’s best not to freeze, as zucchini becomes mushy after thawing.
Why This is Good for You
- Low-carb and keto-friendly: Zucchini replaces traditional pasta to keep carbs low while still feeling like a hearty bowl of “pasta.”
- High in protein: Shrimp offers lean protein to keep you satisfied without excess calories.
- Healthy fats: Butter and olive oil add richness and help with nutrient absorption while supporting a keto approach.
- Micronutrients: Zucchini provides vitamin C and potassium, while lemon adds antioxidants and brightness without sugar.
Common Mistakes to Avoid
- Overcooking the shrimp: They turn rubbery fast.
Pull them as soon as they’re opaque and pink.
- Skipping the zucchini salt-and-dry step: This leads to watery, limp noodles. A quick salt and pat dry makes a big difference.
- Letting garlic brown: Burnt garlic turns bitter. Keep heat moderate and move quickly.
- Overcrowding the pan: Cook shrimp in a single layer for a proper sear.
If your pan is small, cook in batches.
- Too much lemon at once: Add juice, taste, and adjust. You can always add more brightness, but you can’t take it away.
Variations You Can Try
- Creamy lemon version: Stir in 2 tablespoons of heavy cream at the end for a velvety finish.
- Garlic-herb upgrade: Add chopped fresh basil or dill with the parsley for a garden-fresh twist.
- Capers and olives: Toss in a tablespoon of capers or sliced Castelvetrano olives for a briny pop.
- Spicy kick: Use more red pepper flakes or a pinch of cayenne for heat.
- Zoodle blend: Mix zucchini with spiralized yellow squash for extra color and variety.
- Swap the protein: Try scallops or chunks of salmon using the same lemon butter base.
- Dairy-free: Replace butter with more olive oil and a splash of coconut cream for body.
FAQ
How do I keep zucchini noodles from getting watery?
Salt the zoodles and let them sit for about 10 minutes, then pat dry. Cook them quickly over medium heat and avoid covering the pan.
Toss with sauce at the end to prevent them from stewing.
Can I use frozen shrimp?
Yes. Thaw completely in the fridge or under cold running water, then pat very dry before cooking. Excess moisture prevents a good sear and can dilute the sauce.
What size shrimp works best?
Large or extra-large shrimp hold up well and stay juicy.
Aim for 16–20 or 21–25 count per pound. Smaller shrimp cook too fast and can overcook easily.
Can I make this ahead?
It’s best fresh. You can prep the zoodles and mince the garlic ahead, but cook the shrimp and assemble right before serving for the best texture.
What can I use instead of zucchini?
Yellow squash, cucumber (for a cold version), or hearts of palm “noodles” are good low-carb options.
Adjust cooking time, especially with hearts of palm, which need minimal heat.
Is Parmesan keto-friendly?
Yes. Parmesan is low in carbs and adds savory depth. Use a light sprinkle to finish, or skip it to keep the recipe dairy-light.
How do I know when the shrimp are done?
They turn pink and opaque with a gentle C-shape.
If they curl tightly into an O, they’re likely overcooked. Remove them from heat as soon as they change color.
Can I add vegetables?
Absolutely. Sautéed asparagus tips, cherry tomatoes (in moderation for keto), or spinach work well.
Cook add-ins first, then proceed with the sauce and shrimp.
In Conclusion
This Keto Lemon Butter Shrimp Pasta with zucchini noodles is bright, buttery, and fast. With a few simple tricks, you get tender shrimp, crisp zoodles, and a glossy sauce that tastes special without much effort. Keep it classic, or try a variation that fits your mood.
Either way, it’s a low-carb dinner that feels like a treat and fits into any busy weeknight.
Printable Recipe Card
Want just the essential recipe details without scrolling through the article? Get our printable recipe card with just the ingredients and instructions.
