Keto White Sauce Recipe: Velvety Low-Carb Base for Any Dish

This low-carb sauce transforms any dish with its rich, velvety texture. I developed this after struggling to find a keto-friendly alternative to traditional white sauces.

With just a few simple ingredients, you can create a creamy base that works perfectly for casseroles, vegetables, or pasta substitutes. It’s the solution I wish I’d found sooner.

Ingredients for Keto White Sauce

Nine ingredients. Zero carbs. All the creamy richness you crave.

The butter and cream are doing the heavy lifting here—go for the good stuff. Kerrygold butter and Organic Valley heavy cream are my go-tos (the grass-fed versions taste noticeably richer). Cream cheese matters too: Philadelphia brand gives that perfect smooth texture. If you’re watching salt, grab unsalted butter and adjust the seasoning yourself. Nutritional yeast is the secret weapon here—find it in the bulk section at Whole Foods.

No heavy cream? Full-fat coconut milk works in a pinch (the canned kind, not carton). Swap cream cheese for mascarpone if you want it even more luxurious. Dijon can be regular yellow mustard at half the amount, but the flavor won’t be as complex. White pepper is subtle—black pepper works too if that’s what’s in your pantry. Just don’t skip the nutritional yeast—it’s what makes this taste like a real white sauce.

This thickens as it cools, so make it fresh if possible. Stores in the fridge for 5 days in an airtight container. Reheat gently—microwave at 50% power or warm in a saucepan. Freezes surprisingly well for up to 3 months.

Step-by-Step Instructions for Keto White Sauce

Here’s how to create this rich, creamy sauce with perfect consistency every time.

Step 1: Melt Butter and Softened Cream Cheese

In a medium saucepan over medium heat, melt the 0.5 cup Unsalted Butter. Watch for the edges to start bubbling gently—that’s your cue it’s ready for the next addition.

Add the 4 oz Cream Cheese (make sure it’s softened to room temperature) and whisk constantly until the mixture becomes smooth and fully combined. You’ll notice the cream cheese melting into the butter, creating a silky base. This step ensures no lumps remain in your final sauce.

Keep the heat at medium—too high and the dairy can separate. You want a gentle melt, not a rapid boil.

Step 2: Incorporate Heavy Cream and Seasonings

Slowly pour in the 1 cup Heavy Cream while whisking continuously. This gradual addition prevents the sauce from curdling and helps emulsify the fats and liquids.

Now add the 1 tsp Garlic Powder, 1 tsp Onion Powder, 1 tsp Dijon Mustard, 2 tbsp Nutritional Yeast, 0.5 tsp Salt, and 0.25 tsp White Pepper. Whisk vigorously for 1-2 minutes until all the seasonings are fully dissolved and the sauce begins to thicken slightly.

The sauce will take on a pale, creamy color with a subtle sheen. If it looks too thin, don’t worry—it will thicken further as it simmers.

Step 3: Simmer to Desired Thickness

Reduce the heat to low and let the sauce simmer gently for 5-7 minutes. Stir occasionally with a silicone spatula, making sure to scrape the bottom of the pan to prevent sticking.

You’ll know it’s ready when the sauce coats the back of a spoon and leaves a clear trail when you run your finger through it. The texture should be velvety and smooth, not too thick or runny.

If the sauce thickens too much before you’re ready to use it, simply whisk in a splash of heavy cream to loosen it to your desired consistency.

Step 4: Adjust and Serve Warm

Taste and adjust the seasoning if needed. The Dijon Mustard and Nutritional Yeast should provide a balanced tang and umami depth, while the White Pepper adds a subtle warmth without overpowering.

Remove the sauce from the heat and let it sit for 1-2 minutes to cool slightly. This prevents it from breaking when added to hot dishes. Use it immediately over steamed vegetables, grilled meats, or as a base for casseroles.

For best results, serve the sauce warm. It will continue to thicken as it cools, so keep it covered in a warm spot if not using right away.

Make-Ahead Tips for Leftovers

Prep Ahead

You can measure all your dry ingredients—garlic powder, onion powder, nutritional yeast, salt, and white pepper—up to 3 days in advance. Store them in a small airtight container. This saves time and ensures you won’t forget anything. 💡

Softening Cream Cheese

Leave the 4 oz cream cheese on the counter for 1-2 hours to reach room temperature before starting. For a quicker method, microwave it in 10-second bursts at 50% power until slightly softened. This prevents lumps in your sauce.

Batch Cooking

This sauce recipe scales beautifully. Double or triple the ingredients for larger batches. I often make a 4x batch on Sunday to use throughout the week. It reheats well and maintains its creamy texture.

Fridge Storage

Store in an airtight container in the refrigerator for up to 5 days. The flavors will meld and deepen over time. I use glass jars with tight-fitting lids to keep it fresh. ❄️

Reheating Tips

Gently reheat on the stovetop over low heat, stirring frequently. Alternatively, microwave in 30-second intervals at 50% power, stirring between each. Add a splash of heavy cream if it thickens too much.

Freezer Storage

Freeze in ice cube trays for portion control, then transfer to a freezer bag. It keeps for up to 3 months. Thaw overnight in the fridge before reheating for best texture.

Frequently Asked Questions