Garlic Mashed Cauliflower — Crockpot or Instant Pot, 3.9g Net Carbs
/Every mashed cauliflower recipe tells you it tastes just like mashed potatoes. Most of them are lying. This one doesn't taste exactly like mashed potatoes — but it tastes legitimately good in its own right, which is a more useful thing to say. Rich, buttery, garlicky, creamy, and genuinely satisfying next to a protein without feeling like a compromise.
The technique that makes this version better than most: cooking the cauliflower in chicken broth instead of water. The cauliflower absorbs the broth's flavor during cooking, so it's already seasoned before it gets near the butter and sour cream. Drain most of the broth, reserve a tablespoon or two, and you have a built-in thinner for the blending step if the mash comes out too thick.
Crockpot: 3 hours on high, completely hands-off. Instant Pot: 9 minutes, done before the rest of dinner. Both produce the same result. Both work for weekly meal prep or a Thanksgiving table. Leave it in the crockpot on keep warm and it's ready exactly when you are.
Why you'll love this mashed cauliflower
Only 3.9g net carbs per half-cup serving • Crockpot (3 hours, hands-off) or Instant Pot (9 minutes) • Chicken broth as the cooking liquid adds flavor from the inside out • Butter and sour cream for richness — not a watery, thin mash • Keep-warm function holds it perfectly for entertaining • Low carb, gluten free • Tastes better reheated — meal preps all week • Non-low-carb guests enjoy it without knowing
Why Chicken Broth Instead of Water
Most mashed cauliflower recipes boil or steam the cauliflower in plain water. It works — but it's a missed opportunity. Cauliflower is bland on its own and benefits from every available layer of flavor.
Cooking in chicken broth infuses the cauliflower florets with savory, umami flavor during the cooking process — before any butter or seasoning is added. The result is a mash that tastes deeper and more complex than water-cooked cauliflower prepared with the exact same toppings. It's the same principle as cooking rice in broth instead of water.
Don't discard all the broth. Reserve 1-2 tablespoons before draining and set it aside. If the mash comes out too thick during blending, add the reserved broth a tablespoon at a time until it reaches the consistency you want. This gives you control over the final texture without adding more butter.
Ingredients
2 heads of cauliflower, cut into florets — approximately 8-10 cups of florets
16 oz (2 cups) chicken broth — low sodium if preferred. Vegetable broth works for a vegetarian version.
4 tablespoons Kerrygold unsalted grass-fed butter
4 oz (½ cup) full-fat sour cream
1 teaspoon onion powder
2 teaspoons garlic powder — see note on fresh garlic below
1 teaspoon salt, or to taste
1 teaspoon black pepper
Optional garnish: fresh parsley, chives, extra butter, smoked paprika
Fresh garlic vs garlic powder
Garlic powder distributes more evenly through the mash and has a mellower, more integrated garlic flavor. Fresh garlic is more pungent and intense — add 2-3 cloves of minced or roasted garlic in place of the garlic powder. Roasted garlic (an entire head roasted at 400°F for 40 minutes, then squeezed from the skins) creates an exceptionally sweet, deep garlic flavor. If making this for Thanksgiving or a dinner party, roasted garlic is worth the extra effort.
Crockpot Method
The hands-off option. Start it 3 hours before dinner and come back to perfectly cooked cauliflower.
Cut and add. Cut each head of cauliflower into florets, removing and discarding the tough core. Add the florets to the crockpot.
Add broth. Pour 16 oz of chicken broth over the cauliflower.
Cook. Set the crockpot to high for 3 hours. The cauliflower should be completely tender and starting to fall apart when pressed with a fork — this is exactly what you want.
Reserve, then drain. Before draining, scoop out 2-3 tablespoons of the broth and set aside. Drain the remaining broth and discard.
Blend. Using a hand-held mixer (recommended) or a food processor, blend the cooked cauliflower until smooth. Start on low to break up the large pieces, then increase to medium-high. Add the reserved broth a tablespoon at a time if the mash is too thick.
Add flavor. Add the butter, sour cream, garlic powder, onion powder, salt, and pepper to the blended cauliflower. Blend again until fully combined and smooth.
Taste and adjust. Taste and adjust seasoning. More garlic? More salt? More butter? This is the step where you make it yours.
Keep warm. Return the finished mash to the crockpot on keep warm until ready to serve. Stir occasionally. Stays perfectly warm for up to 2 hours.
Instant Pot Method
When you need it faster. Nine minutes of pressure cooking produces the same result as 3 hours in the crockpot.
Cut and add. Cut cauliflower into florets and add to the Instant Pot insert.
Add broth. Pour 16 oz chicken broth over the cauliflower.
Seal and cook. Seal the lid. Pressure cook on high for 9 minutes.
Release. Natural release for 5 minutes, then manually release remaining pressure.
Reserve, then drain. Scoop out 2-3 tablespoons of broth before draining. Drain remaining broth.
Blend and season. Blend with hand mixer, add reserved broth if needed for consistency, then add butter, sour cream, garlic powder, onion powder, salt, and pepper. Blend until smooth. Taste and adjust.
Getting the Texture Right
The texture of mashed cauliflower is where most recipes go wrong — either too thin and watery, or too thick and dense. A few tips:
Too thin: the cauliflower wasn't drained thoroughly enough, or sour cream was added too quickly. Put the mash back on low heat for 5 minutes uncovered to evaporate excess moisture, stirring constantly. Or blend in an extra tablespoon of sour cream.
Too thick: add the reserved chicken broth a tablespoon at a time until it loosens to the right consistency. Warm broth works better than cold.
Too grainy: the cauliflower wasn't cooked long enough. It needs to be completely soft — fork tender isn't enough. It should be soft enough that it falls apart when pressed. Blend longer if still grainy.
For the smoothest result: use a food processor with a standard blade rather than a hand mixer. Blend in batches if needed. The food processor produces a smoother, more uniform result than a hand mixer.
Flavor Variations
Loaded cauliflower mash
Top each serving with: shredded sharp cheddar, crumbled sugar-free bacon, sliced green onions, and a dollop of sour cream. The low carb baked potato experience.
Parmesan and roasted garlic
Use one full head of roasted garlic (roast at 400°F for 40 minutes, squeeze from skins) in place of garlic powder. Add ¼ cup of freshly grated Parmesan to the mash during blending. Elegant enough for a dinner party, easy enough for a Tuesday.
Herb and cream cheese
Swap the sour cream for 4 oz of softened cream cheese. Add 2 tablespoons of fresh chives and 1 tablespoon of fresh parsley. The cream cheese creates a slightly richer, denser mash than sour cream.
Brown butter mashed cauliflower
Brown the butter before adding — cook in a saucepan over medium heat until it turns golden and smells nutty. Add browned butter to the mash in place of regular butter. This adds a nutty, caramelized depth that makes simple mashed cauliflower taste significantly more complex.
What to Serve With Mashed Cauliflower
Low Carb Meat Loaf Muffins — the cauliflower mash makes for the perfect side dish
Sweet Heat BBQ Dry Rub — this recipe is a dry rub for chicken, ribs, pork etc and cauliflower mash would be a delicious side dish for either option
Low Carb Green Bean Casserole — the full Thanksgiving low carb spread
Storage and Reheating
Refrigerator: up to 5 days in an airtight container. The mash often tastes better on day 2 and 3 as the garlic flavor deepens.
Reheating: stovetop over medium-low heat with a splash of chicken broth, stirring frequently — this restores the creamy texture better than microwaving. Microwave at 70% power in 60-second intervals, stirring between each, also works.
Freezer: mashed cauliflower freezes surprisingly well — up to 3 months in an airtight container. Thaw overnight in the refrigerator and reheat on the stovetop with a splash of broth. The texture may be slightly more watery than fresh — blend again briefly to re-emulsify.
Frequently Asked Questions
Can I use frozen cauliflower instead of fresh?
Yes — this recipe works with frozen cauliflower florets. No need to thaw first. Add directly to the crockpot with the broth. The cooking time is the same. Frozen cauliflower tends to release more water than fresh — drain thoroughly and add the reserved broth back only if the mash needs thinning.
Why is my mash watery?
Two causes: the cauliflower wasn't drained well enough, or it released excess water during blending. Fix: spread the drained cauliflower on a kitchen towel for a few minutes before blending to absorb excess moisture. Or put the finished mash over low heat for 5 minutes uncovered, stirring constantly, to evaporate the water.
Is this good for Thanksgiving?
It's excellent for Thanksgiving — the crockpot method means it cooks while the oven is busy with other dishes, and the keep-warm function holds it perfectly until dinner. Make it earlier in the day, leave it on keep warm, stir occasionally. It frees up oven space and stays hot without any attention.
Can I make this dairy-free?
Yes — substitute the butter with vegan butter or refined coconut oil and the sour cream with full-fat coconut cream (the thick cream from the top of an unshaken can) or dairy-free sour cream (Forager makes an excellent one). The flavor will be slightly lighter but still very good.
More Low Carb Side Dishes and crockpot recipes
Garlic Mashed Cauliflower
This garlic mashed cauliflower is made in the crockpot or Instant Pot — cooked in chicken broth for extra flavor, then blended with butter and sour cream. Only 3.9g net carbs per serving.
Ingredients
Instructions
- Add cauliflower florets and chicken broth to crockpot.
- Cook on high for 3 hours until cauliflower is very tender.
- Reserve 2-3 tbsp broth before draining. Drain and discard remaining broth.
- Blend with hand mixer until smooth. Add reserved broth if too thick.
- Add butter, sour cream, garlic powder, onion powder, salt, and pepper. Blend until combined.
- Taste and adjust seasoning. Return to crockpot on keep warm until serving
- Add cauliflower and broth to Instant Pot. Seal lid.
- Pressure cook on high for 9 minutes. Natural release 5 minutes, then manual release.
- Reserve broth, drain, blend, season as above.
Notes
- Reserve 2-3 tbsp broth before draining — use to thin the mash if too thick
- Cauliflower must be very soft, not just fork-tender — it should fall apart
- Food processor produces a smoother result than a hand mixer
- For loaded version: top with cheddar, bacon, green onion, sour cream
- Freezes well up to 3 months — reheat on stovetop with splash of broth
Nutrition Facts
Calories
73Protein
2.6 gCarbs
3.9 gFat
5 g1 serving = 1/2 cup
Nutritional information is provided and I keep it as accurate as possible. Keep in mind nutrition facts on all ingredients may vary depending on the different brands you may use. I am not a doctor and advise solely from personal experience. Please consult your doctor before adding any supplement or foods to your current diet.
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