Mayonnaise White Sauce Recipe: Rich and Velvety Base for Many Dishes

This mayonnaise-based white sauce transforms simple dishes into restaurant-quality creations with its rich, velvety texture. I developed this recipe to add depth to casseroles, sandwiches, and pasta without complicated techniques.

With just a few pantry staples and 5 minutes of whisking, you’ll have a smooth, creamy sauce that clings perfectly to every bite. It keeps well in the fridge for up to a week, making it ideal for meal prep.

Ingredients for Mayonnaise White Sauce

A handful of pantry staples creates this luscious, velvety sauce in minutes.

The mayo is the backbone here. Duke’s or Hellmann’s give that perfect rich base—skip the low-fat versions, they break too easily. For the milk, whole gives the creamiest result, but 2% works in a pinch. The butter should be unsalted so you control the seasoning. I grab mine from Trader Joe’s (their cultured butter is a steal), but any grocery store brand is fine.

No Dijon? Regular yellow mustard at half the amount gets you close. Out of milk? A splash of half-and-half or heavy cream adds even more richness. If you want extra depth, a pinch of nutmeg (freshly grated if you’re fancy) works wonders. The flour is non-negotiable for thickening, but cornstarch at half the amount can sub if you’re gluten-free.

Sauce keeps 5-7 days in the fridge—stir before using as it thickens when cold. Freezing isn’t ideal (it can separate), but it works for 1 month if you’re desperate. Whisk in a splash of milk to revive after storage.

Step-by-Step Instructions for Mayonnaise White Sauce

Here’s how I create this silky sauce—smooth, rich, and perfectly balanced every time.

Step 1: Create the Roux Base

Melt the 2 tbsp Unsalted Butter in a medium saucepan over medium heat. Once the butter is fully melted and begins to foam slightly, whisk in the 2 tbsp All-Purpose Flour to form a smooth paste.

Cook this roux for 1-2 minutes, stirring constantly with a wooden spoon. You want it to turn a pale golden color—this removes the raw flour taste. Keep the heat moderate; if it browns too quickly, it can add a bitter, toasted flavor that we don’t want here.

Step 2: Gradually Incorporate the Milk

Slowly pour in the 0.5 cup Whole Milk, whisking continuously to prevent lumps from forming. A steady stream is key—I like to add it in small splashes, giving the roux time to absorb the liquid and thicken between additions.

Once all the milk is incorporated, continue cooking for 3-4 minutes until the mixture thickens enough to coat the back of a spoon. The sauce should be smooth and creamy, with no visible streaks of flour. If it’s too thick, add a splash more milk.

Step 3: Add Flavorings and Finishing Touches

Reduce the heat to low and stir in the 1 cup Mayonnaise. Mix well until fully combined and the sauce is velvety smooth. The mayonnaise will enrich the texture and add a subtle tang.

Next, add the 0.5 tsp Garlic Powder, 0.5 tsp Onion Powder, 1 tsp Dijon Mustard, 1 tsp Lemon Juice, 0.5 tsp Kosher Salt, and 0.25 tsp White Pepper. Stir to distribute the seasonings evenly. Taste and adjust the salt if needed—remember, the sauce will continue to develop flavor as it sits.

Step 4: Simmer and Refine

Let the sauce simmer on low heat for 2-3 minutes, stirring occasionally. This final cooking step allows the flavors to meld together beautifully. Watch for the sauce to thicken slightly more—it should be creamy but still pourable.

If the sauce becomes too thick during simmering, whisk in a small amount of warm milk to reach your desired consistency. The finished sauce should have a glossy sheen and a smooth, luscious texture. Serve warm or let it cool for use in casseroles or as a creamy base for other dishes.

Health Benefits of This mayonnaise white sauce

Rich in Healthy Fats

This sauce gets its luscious texture from mayonnaise, which contains heart-healthy monounsaturated fats that support good cholesterol levels. A 2-tbsp serving provides about 10g of fat, mostly from the oil in mayo and butter, giving you sustained energy. 💪

Vitamin E Source

Both mayonnaise and butter are rich in vitamin E, a powerful antioxidant that protects your cells from damage. The Dijon mustard adds a small boost too, making this sauce a surprising source of this essential nutrient.

Calcium Boost

The whole milk in this recipe contributes about 50mg of calcium per ¼ cup serving, supporting bone health. While not a primary source, every bit counts toward your daily needs.

Energy-Dense

With approximately 120 calories per 2-tbsp serving, this sauce provides a quick energy boost. The combination of fats and a touch of carbs from flour makes it satisfying and perfect for fueling busy days.

Low in Sugar

Unlike many store-bought sauces, this version contains virtually no added sugar. The only trace amounts come naturally from the milk, making it a great option for those watching their sugar intake.

Protein Contribution

While not a high-protein food, the milk and mayonnaise provide about 1g of protein per 2-tbsp serving. It’s a small but meaningful addition to your meal’s nutritional profile.

Frequently Asked Questions