Slow-Cooked Beef Brisket with Carrot and Celery Root Mash

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Tender slow-cooked beef brisket infused with herbs, paired with creamy carrot and celery root mash for a comforting Whole30 meal. This whole30-inspired beef (whole30, paleo) ready in about 225 minutes pairs trimmed beef brisket, large, peeled and chopped carrots, smashed garlic cloves for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 520 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 210 min Serves 6 Whole30 cuisine 520 cal/serving
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Ingredients

Instructions

  1. Step 1: Season 3 lbs trimmed beef brisket with 2 tsp sea salt and 1 tsp black pepper evenly on all sides. Heat 2 tbsp olive oil in a large heavy-bottomed pot over medium-high heat. Sear brisket for 5 minutes per side until deep brown crust forms.
  2. Step 2: Remove brisket and set aside. Add 5 smashed garlic cloves, 2 sprigs rosemary, and 3 sprigs thyme to the pot. Pour in 2 cups Whole30-compliant beef broth and scrape browned bits from bottom.
  3. Step 3: Return brisket to pot, cover, and reduce heat to low. Simmer gently for 3 to 3.5 hours until meat is fork-tender.
  4. Step 4: Meanwhile, bring a large pot of salted water to boil. Add 4 large peeled and chopped carrots and 1 medium peeled and chopped celery root. Boil for 20 minutes until vegetables are very tender.
  5. Step 5: Drain vegetables and mash with a potato masher until smooth. Season mash with 1/2 tsp sea salt and a drizzle of olive oil if desired.
  6. Step 6: Slice brisket against the grain and serve over the carrot and celery root mash with pan juices spooned on top.

Equipment for this recipe

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Frequently asked questions

How long does Slow-Cooked Beef Brisket with Carrot and Celery Root Mash take to make?

Total time is about 225 minutes (15 min prep + 210 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Slow-Cooked Beef Brisket with Carrot and Celery Root Mash?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep trimmed beef brisket from drying out.

Can I substitute ingredients in Slow-Cooked Beef Brisket with Carrot and Celery Root Mash?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Slow-Cooked Beef Brisket with Carrot and Celery Root Mash for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Slow-Cooked Beef Brisket with Carrot and Celery Root Mash whole30?

Yes — this recipe is tagged whole30, paleo, gluten free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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