Low-Carb, Keto Shrimp and Sausage Gumbo

Gumbo is the kind of dish that fills the whole house with the smell of dinner and pulls everyone toward the kitchen. The problem? Traditional gumbo starts with a flour-and-oil roux — a non-starter on a low carb diet. This keto version skips the flour entirely and still delivers everything you love: a deep, savory broth, plump shrimp, spicy sausage, and a thick, spoon-coating body. It’s bold, hearty comfort food that happens to be completely grain-free and gluten-free.

The secret is two-fold. First, a quick homemade shrimp broth made from the shells builds a rich, briny depth you simply can’t get from a carton. Second, a sprinkle of guar gum thickens the pot to that classic gumbo consistency without a speck of flour. The result is one of those keto recipes that doesn’t taste “low carb” at all — it just tastes like really good gumbo. It’s filling, satisfying, and special enough to serve for a celebration. (More on that below — it makes a fantastic Father’s Day dinner.)

Why You’ll Love This Keto Gumbo

• It’s real comfort food, made keto. Spicy, savory, and deeply satisfying, this gumbo scratches the comfort-food itch while keeping things keto friendly and low carb friendly.
• No roux, no flour. Guar gum does the thickening, so you get that signature gumbo body with none of the grains. It’s naturally grain-free and gluten-free.
• That homemade shrimp broth. Using the shrimp shells to make a quick broth is the move that takes this from good to restaurant-worthy. Don’t skip it.
• Filling and protein-packed. Between the shrimp and Italian sausage, this is a hearty, fork-and-spoon meal that keeps you full — exactly what you want from a keto dinner.
• Perfect for a special occasion. It feels like a treat, which makes it ideal for a Father’s Day dinner or any time you want to put something memorable on the table.

Why Skip the Roux?

A classic gumbo roux is equal parts flour and fat, cooked low and slow until deep brown. It’s delicious — and it’s pure carbs, which is why traditional gumbo doesn’t fit the ketogenic diet. Guar gum solves this beautifully. It’s a plant-based thickener that needs only a tiny amount to do its job, adds no carbs to speak of, and lets you dial in exactly the thickness you want. Sprinkle a little at a time, stir, and stop when it looks right.

How to Make It

The full ingredient amounts and steps are in the recipe card below — here’s the walkthrough.

Make the shrimp broth first. Peel and devein your shrimp, setting the meat aside and dropping the shells into a pot. Add the broth vegetables, crushed bay leaves, minced garlic, Cajun seasoning, and 6 cups of water. Bring it to a rapid boil, then drop to low and simmer, covered, for an hour. Strain it and you’ve got a deeply flavored base. This is the backbone of the whole dish, so give it the full hour.

Build the gumbo. Slice the sausage thin and chop your vegetables. Sauté the veggies, crushed bay leaves, and dry seasonings in a little oil over medium-high heat until tender, about 10 minutes — this is where the flavor base develops. Pour in the reserved shrimp broth, bring to a boil, and simmer covered for about 15 minutes.

Add the proteins. Stir in the shrimp and sliced sausage and simmer about 10 minutes more, until the sausage is cooked through and the shrimp are pink and tender. Season with salt to taste.

Thicken and serve. Sprinkle guar gum evenly over the pot, a little at a time, stirring as you go until you reach your desired thickness. Ladle it up and serve hot.

My Best Tips

• Use the shells. The homemade shrimp broth is what makes this gumbo taste like more than the sum of its parts. It’s a five-minute task that pays off enormously.
• Go slow with the guar gum. A little goes a long way. Sprinkle it evenly rather than dumping it in one spot, and add gradually — it’s easy to over-thicken and impossible to undo.
• Don’t overcook the shrimp. Add them toward the end and pull the pot once they turn pink and opaque. Overcooked shrimp get rubbery.
• Adjust the heat. Cajun seasoning brands vary in saltiness and spice. Taste before you add extra salt, and start light if you’re heat-sensitive.
• Let it rest. Like most stews, gumbo tastes even better after sitting a few minutes (or reheated the next day) once the flavors meld.

Substitutions and Swaps

• Sausage: Hot Italian sausage brings the heat, but andouille is the traditional choice if you can find a low-sugar, keto-friendly version. Smoked sausage works too.
• Shrimp: Fresh is ideal for the shells-to-broth trick, but if you only have pre-peeled shrimp, use a good seafood stock and skip the broth-making step.
• Thickener: No guar gum? Xanthan gum works the same way — use it sparingly, as it’s even more potent.
• Vegetables: Bell pepper, celery, and onion are the classic gumbo “trinity.” Keep the onion modest to stay low in carbs, and feel free to add a little extra celery and pepper.
• Spice level: Add a chopped jalapeño or a pinch of cayenne to the gumbo itself if you like it fiery.

Low-Carb, Keto Shrimp and Sausage Gumbo

A rich, hearty keto shrimp and sausage gumbo made without any flour or roux. A homemade shrimp broth builds deep flavor, while guar gum thickens the pot the low-carb way. Loaded with plump shrimp and spicy Italian sausage, it's grain-free, gluten-free, and filling enough for a special keto dinner — perfect for Father's Day.

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Prep Time 20 minutes mins

Cook Time 1 hour hr 40 minutes mins

Course Dinner, Lunch

Ingredients

  

For the Shrimp Broth

• Shells from 1 lb shrimp reserve the peeled shrimp for the gumbo
• 1 jalapeño
• 1/4 cup yellow onion
• 2 celery ribs
• 3 bay leaves
• 2 garlic cloves
• 2 shakes Cajun seasoning
• 6 cups water

For the Gumbo

• 1 teaspoon oil
• 1 green bell pepper
• 2 stalks celery
• 1/4 cup yellow onion
• 2 bay leaves
• 2 tablespoons Cajun seasoning
• 1/2 tablespoon black pepper
• 1 lb hot Italian sausage links
• 1 lb shrimp peeled and deveined (reserved from above)
• Salt to taste
• 3 tablespoons guar gum healthy thickener

Instructions

 

Make the Shrimp Broth

• Peel and devein the shrimp. Set the shrimp aside in a bowl and place the shells in a pot.
  
• Chop and cut all the broth vegetables. Crush the bay leaves by hand and add them to the pot, then mince the garlic cloves and add them as well.
• Pour 6 cups water into the pot and place the lid on top.
• Bring to a rapid boil, then shake in the broth seasonings.
• Reduce the heat to low and let the broth simmer, covered, for 1 hour.
• Strain the broth and set aside.

Make the Gumbo

• Cut the sausage into 1/8-inch slices. Chop all the gumbo vegetables and set aside.
  
• Add the oil to a large skillet or stockpot set over medium-high heat.
• Add the vegetables, crushed bay leaves, and all the gumbo dry seasonings. Sauté until the vegetables are tender, about 10 minutes.
  
• Pour in the reserved shrimp broth and bring to a boil. Cover and simmer about 15 minutes.
• Add the shrimp and sliced sausage and simmer 10 minutes more, or until the sausage is cooked through.
• Add salt to taste.
• Evenly sprinkle some guar gum over the gumbo and stir in. Keep adding until your desired thickness is reached.
  
• Serve.
  

Notes

Nutrition (estimated, based on 6 servings)

Nutrient	Per serving	Whole pot
Calories	~315 kcal	~1,890 kcal
Fat	~20 g	~120 g
Saturated fat	~7 g	~40 g
Total carbs	~8 g	~48 g
Fibre	~4.5 g	~27 g
Net carbs	~3.5 g	~21 g
Sugars	~1 g	~6 g
Protein	~29 g	~174 g

A Keto Dinner Worth Gathering Around

This shrimp and sausage gumbo is proof that the ketogenic diet doesn’t mean giving up the dishes you love — it just means making them smarter. It’s rich, filling, and full of flavor, with none of the grains or gluten. Make a big pot for a cozy weeknight, or dress it up for a Father’s Day dinner that’ll have everyone going back for seconds. Either way, this is one keto recipe that earns a permanent spot in the rotation.