Creamy Keto Beef Stroganoff with Mushrooms

This easy Keto Beef Stroganoff is a classic Russian comfort dish from my childhood home. In our Russian/German household it was commonly made from leftover roast beef and always served over mashed potatoes. For a low-carb version, there are several delicious alternatives to enjoy this creamy, savory favorite.

Growing up, Beef Stroganoff was our dependable “leftovers” meal. After a Sunday roast or brisket, my mother would slice the leftover beef thinly and turn it into stroganoff for the next day. That familiar mix of tender beef, onions, mushrooms and sour cream is the ultimate comfort food and adapts easily to a ketogenic diet.

What You’ll Need to Make My Mom’s Beef Stroganoff

• 1 lb thinly sliced cooked beef (steak, roast, brisket, or even ground beef)
• 2 tbsp olive oil or avocado oil
• 1 small onion, sliced
• 1 tsp minced garlic
• 1 tsp dried thyme (or 1–2 tsp fresh)
• Salt and freshly ground black pepper, to taste
• 2 tbsp tomato paste
• 2 tbsp red wine vinegar (or a splash of red wine)
• 1 cup beef stock
• 8 ounces sliced mushrooms (any variety)
• 1/2 cup sour cream

For best results, I like to cook this in a two-handled cast-iron pan to get a good sear on the mushrooms and beef and then serve it straight from the pan. A non-stick skillet also works well if you prefer.

Serving Suggestions — Best Low-Carb Options

The key to serving stroganoff is having something that soaks up the rich, creamy gravy. My top keto choices are cauliflower mash or hearty keto pasta noodles. Other great low-carb options include:

• Baked spaghetti squash
• Zucchini noodles (zoodles)
• Steamed or sautéed cabbage
• Cauliflower rice
• Keto buns or low-carb bread

My Mom’s Beef Stroganoff Recipe (Tweaked for Keto)

This version stays true to the Russian family favorite while keeping carbs low. It’s quick to prepare when you already have cooked beef on hand, and it’s easy to adapt if you’d like to brown raw beef yourself.

Ingredients

• 2 tbsp olive or avocado oil
• 1 small onion, sliced
• 1 tsp minced garlic
• 1 tsp dried thyme
• Salt and pepper to taste
• 2 tbsp tomato paste
• 2 tbsp red wine vinegar
• 1 cup beef stock
• 8 ounces sliced mushrooms
• 1 lb cooked beef, thinly sliced (or raw thinly sliced beef if cooking from scratch)
• 1/2 cup sour cream

Instructions

1. Heat the oil in a frying pan over medium-high heat. Add the sliced onion, minced garlic, thyme, salt and pepper. Cook until the onions are softened and translucent.
2. If using raw thinly sliced beef, add it now and cook until browned. Otherwise, continue with the cooked beef later.
3. Add the tomato paste, red wine vinegar and beef stock, stirring to combine. Add the sliced mushrooms.
4. Reduce the heat and simmer for about 15 minutes, until the mushrooms are tender and the sauce has reduced slightly.
5. If you used cooked beef, add the sliced beef now and simmer a few more minutes just to heat through. Taste and adjust seasoning.
6. Remove the pan from heat and stir in the sour cream until the sauce is smooth and creamy. Do not boil after adding sour cream to prevent curdling.

Note: If starting from raw beef, brown it first and then proceed with the mushrooms and liquid, allowing extra simmer time until the meat is cooked through.

Tips and Variations

• For deeper flavor, deglaze the pan with a splash of red wine or additional vinegar after browning the meat, scraping up the browned bits.
• Use a mix of mushroom varieties for more texture and complexity.
• For a dairy-free version, substitute full-fat coconut cream or a cashew cream, keeping in mind the flavor will change.
• Leftovers taste great and the sauce often improves after a day in the fridge. Reheat gently on low heat to avoid breaking the sauce.

Storage: Refrigerate leftovers in an airtight container for up to 3–4 days. To freeze, cool completely and store in a freezer-safe container for up to 2 months. Thaw in the refrigerator and reheat gently.

Save This Russian Beef Stroganoff

This family-style Keto Beef Stroganoff is simple, satisfying and flexible. Whether made from leftovers or prepared with fresh ingredients, it’s a comforting meal that pairs beautifully with cauliflower mash, keto noodles, or roasted vegetables.