There’s something magical about a bowl of soup that feels like a warm hug yet still keeps your wellness goals on track. This Low-Calorie Creamy Shrimp and Spinach Soup has become my go-to comfort meal on busy weeknights when I want something luxurious without the calorie overload. I first developed it for a friend who was recovering from a winter cold—she needed protein, iron, and comfort, all in one spoonful. One taste and I was hooked; the velvety broth, the pop of sweet shrimp, the earthy spinach, all finished with a whisper of nutmeg that makes the flavors sing. It’s elegant enough for date night (hello, Valentine’s!), speedy enough for a 30-minute supper, and light enough that you’ll still have room for a piece of dark chocolate afterward. Whether you’re meal-prepping lunches or setting the table for guests, this soup is here to prove that “creamy” and “low-calorie” absolutely can coexist.

Why This Recipe Works

Lightened-Up Roux: We skip the traditional butter-flour roux and use a slurry of cornstarch and 2 % milk—cuts 200 calories per serving without sacrificing silkiness.
Flavor Layering: Sautéed shallots, garlic, and a pinch of smoked paprika build depth so you won’t miss the heavy cream.
Wild Shrimp Sweetness: Using wild-caught medium shrimp means sweet, briny pops in every bite—no fishy aftertaste.
Iron-Rich Spinach: Baby spinach wilts in seconds and adds folate, vitamin C, and color.
One-Pot Wonder: Minimal dishes, maximum comfort—perfect for small kitchens.
Freezer-Friendly: Make a double batch; leftovers thaw like a dream for up to 3 months.

Ingredients You'll Need

Quality ingredients make quality soup. Here’s what to grab—and why each matters.

Wild-caught shrimp (1 lb, peeled, deveined, tails-off): 31/40 count size is perfect—large enough to feel indulgent, small enough to cook in under 3 minutes. Wild shrimp taste sweeter and have a firmer bite than farmed. Thaw overnight in the fridge or under cold running water for 10 minutes. Pat very dry so they sear rather than steam.

Baby spinach (5 packed cups): Young leaves are tender and require zero prep beyond a quick rinse. If you only have curly spinach, remove the stems and chop roughly. Swap with baby kale for an earthier note.

Low-sodium chicken broth (4 cups): The backbone of the soup. Low-sodium keeps the salt in your control; you can always season later. Vegetable broth works for pescatarians, but chicken adds more body.

2 % milk (1 ¾ cups): The sweet spot between skim (too watery) and whole (too rich). Let it come to room temp before adding to prevent curdling. Lactose-free or unsweetened oat milk both work if dairy is off the table.

Cornstarch (3 Tbsp): A neutral thickener that keeps the soup gluten-free. Whisk with a splash of cold milk until smooth—no lumps, no worries.

Shallots (2 medium): Milder and sweeter than onion, they melt into the background. Yellow or white onion is fine in a pinch; add a pinch of sugar to mimic shallot sweetness.

Garlic (3 cloves, minced): Fresh is best; jarred can taste acrid here. Smash, salt, and chop into a paste for maximum diffusion.

Extra-virgin olive oil (2 tsp): Just enough to sweat the aromatics. You can sub avocado oil or even a non-stick spray to shave 30 calories, but the flavor trade-off is real.

Smoked paprika (½ tsp): Adds subtle campfire complexity without any actual bacon. Regular paprika works; add a tiny pinch of chipotle if you like heat.

Freshly grated nutmeg (⅛ tsp): The secret “what is that?” note that marries seafood and greens. Buy whole nuts and microplane—pre-ground tastes like sawdust.

Lemon zest (from 1 lemon): Brightens the creamy base and balances the sweet shrimp. Zest before juicing; the oils fade quickly.

Salt & freshly cracked black pepper: Add in layers—first to the aromatics, then at the end. Soup can take more salt than you think when the base is milk.

How to Make Low Calorie Creamy Shrimp And Spinach Soup

Prep & thaw

Place shrimp in a colander under cold running water for 5 minutes until pliable. Transfer to a paper-towel-lined baking sheet, pat completely dry, and season with a pinch of salt and smoked paprika. Let stand 10 minutes so the seasoning adheres.

Build the aromatic base

Heat olive oil in a heavy 4-quart Dutch oven over medium. When the surface shimmers, add minced shallots. Sauté 2–3 minutes until translucent, stirring with a wooden spoon to prevent browning. Add garlic; cook 45 seconds until fragrant. You want soft and sweet, not caramelized.

Create the slurry

In a medium bowl whisk cornstarch into ¼ cup of the milk until completely smooth. Whisk in remaining milk and set aside. This prevents starches from clumping when they hit heat.

Simmer the broth

Pour chicken broth into the pot, increase heat to medium-high, and bring to a gentle boil. Reduce to a lively simmer for 5 minutes so the shallot flavor infuses. Taste; add salt conservatively now—about ½ tsp.

Add the milk slurry

Whisk the milk mixture once more (starch settles) then drizzle it slowly into the simmering broth while stirring constantly. Continue stirring until the soup thickens enough to lightly coat the spoon—about 2 minutes. Do NOT let it boil hard or milk proteins can curdle.

Season the base

Reduce heat to low. Stir in nutmeg, lemon zest, and a few grinds of black pepper. The soup should taste a touch under-seasoned at this stage because shrimp will add salinity.

Cook the shrimp

Increase heat to medium so tiny bubbles appear around the edge. Add shrimp in a single layer; poach 2–3 minutes, just until they turn pink and curl into loose “C” shapes. Flip once halfway for even cooking. Overcooking equals rubber—set a timer!

Wilt in the spinach

Pack in baby spinach—it looks like too much but wilts dramatically. Stir 30–45 seconds until bright green and just wilted. Bright color means nutrients stay intact.

Final seasoning & serve

Taste, add more salt or pepper if needed, and a squeeze of lemon juice for brightness. Ladle into warm bowls and garnish with extra lemon zest, cracked pepper, or a drizzle of bright-green parsley oil if you’re feeling fancy.

Expert Tips

Temperature matters

Cold milk can curdle when it hits hot broth. Leave it on the counter while you prep everything else.

Shrimp sizing cheat

If you only have jumbo shrimp, slice them in half horizontally—they’ll cook at the same rate and stretch further.

Blender hack

For ultra-silky texture, immersion-blend the soup for 5 seconds before adding shrimp—just enough to break down shallots.

Salt timing

Broth reduces slightly; salting at the end prevents over-salting.

Make it dairy-free

Swap milk for unsweetened almond milk and add 2 Tbsp plain coconut yogurt for richness—calories stay similar.

Double-batch rule

Soup thickens as it sits; thin with broth or water when reheating and adjust seasonings.

Variations to Try

Spicy Cajun: Replace smoked paprika with 1 tsp Cajun seasoning and add diced fire-roasted tomatoes for a Creole twist.
Creamy Coconut Thai: Swap milk for light coconut milk, add 1 tsp grated ginger and 1 tsp Thai red curry paste. Finish with lime juice and cilantro.
Spring Veggie: Toss in 1 cup asparagus tips and ½ cup peas with the spinach for color and crunch.
Protein Swap: Use diced chicken breast or firm tofu for a shellfish-free version; sauté until just cooked before adding broth.
Low-Carb “Rice”: Stir in ½ cup cooked cauliflower rice during the last minute for extra bulk minus the carbs.

Storage Tips

Refrigerator: Cool soup completely, transfer to airtight containers, and refrigerate up to 4 days. The flavors meld beautifully on day 2. When reheating, warm gently over medium-low, stirring often; high heat can toughen shrimp and cause milk to separate.

Freezer: Skip the freezer if you can—spinach can turn murky and shrimp may become rubbery. If you must, undercook the shrimp by 1 minute, freeze in single portions, and consume within 3 months. Thaw overnight in the fridge, then reheat slowly with a splash of broth.

Make-Ahead Components: Chop shallots and garlic, zest the lemon, and wash spinach up to 3 days ahead; store each in separate containers. You can also pre-mix the cornstarch slurry and refrigerate for 24 hours; shake before using.

Frequently Asked Questions

Yes. Thaw 10 oz frozen chopped spinach, squeeze absolutely dry, and add during step 8. It will look darker but still tastes great.

Warm milk to room temp, add slowly while stirring, and never let the soup reach a rolling boil after milk goes in. If it does curdle, blend briefly with an immersion blender to re-emulsify.

Use sauté mode for steps 2–4, whisk in milk slurry, then cook on Manual High for 0 minutes (yes, zero) with quick release. Stir in shrimp and spinach on sauté-low until pink. Fastest weeknight win ever.

At 12 g net carbs per serving it can fit a relaxed keto plan. Replace cornstarch with ½ tsp xanthan gum to drop carbs to 6 g.

A crusty slice of no-knead bread or warm naan for dipping, plus a crisp cucumber-fennel salad for crunch. For wine, reach for a bright Sauvignon Blanc or non-alcoholic sparkling lemon.

Absolutely—use a 6-quart pot and increase everything proportionally. You may need an extra minute or two to bring the larger volume to a simmer.