Plaza Azteca White Sauce Recipe: Tangy Cream Base for Mexican Dishes

This creamy white sauce is the foundation of many beloved Mexican dishes, offering a tangy richness that perfectly complements bold flavors. I’ve refined this recipe to capture the authentic taste you’d find at Plaza Azteca.

With just a few simple ingredients and 10 minutes of prep, you’ll create a versatile sauce that elevates tacos, enchiladas, and more. The secret lies in balancing the creaminess with just the right amount of zesty tang.

Ingredients for Plaza Azteca White Sauce

Nine ingredients transform into that signature creamy, tangy Mexican white sauce.

The sour cream is non-negotiable here—full-fat Daisy or Breakstone’s gives you that rich, authentic base. Buttermilk adds the tang, so don’t skip it. Kroger’s or Walmart carry both in the dairy aisle. I always grab the Mexican oregano from the Latin foods section (it’s got a different punch than the regular stuff). The garlic and onion powders are doing heavy lifting, so use fresh if you can.

No buttermilk? Whole milk plus 1 tsp vinegar works in a pinch. Out of Mexican oregano? Regular oregano plus a pinch of marjoram gets close. The vinegar can be apple cider, but stick to white for that classic taste. If you’re watching fat, light sour cream works (but texture might suffer). Hellmann’s mayo is my go-to—consistent every time.

Sauce keeps 1 week in the fridge—stir before using since it thickens. Freezes for 3 months (thaw overnight in the fridge). I make a double batch and freeze half—perfect for last-minute taco nights.

Step-by-Step Instructions for Plaza Azteca White Sauce

This tangy cream base comes together in minutes with just a whisk and a bowl.

Step 1: Combine Creamy Base Ingredients

In a medium mixing bowl, add the 1 cup Sour Cream and 0.5 cup Mayonnaise. I always use full-fat sour cream here—it gives the sauce that rich, velvety texture that makes it so addictive. Whisk them together until completely smooth and uniform in color.

This step creates the creamy foundation of the sauce. Don’t rush the whisking; you want to eliminate any streaks or separation between the two ingredients. The mixture should look like a thick, pale white cream.

Step 2: Incorporate the Liquids

Pour in the 0.25 cup Buttermilk and 1 tbsp White Vinegar. The buttermilk adds a subtle tang that balances the richness, while the vinegar gives it that characteristic Plaza Azteca zing. Whisk vigorously for 30 seconds until fully emulsified.

Here’s the thing—if your buttermilk has separated, make sure to shake the carton well before measuring. The vinegar might cause slight curdling at first, but keep whisking. The mixture should smooth out into a pourable but still thick sauce.

Step 3: Add the Seasonings

Sprinkle in the 1 tsp Garlic Powder, 1 tsp Onion Powder, 0.5 tsp Dried Oregano, 0.5 tsp Salt, and 0.25 tsp Ground Cumin. These spices are what give the sauce its distinctive Mexican-inspired flavor profile.

I always use Mexican oregano when available—it has a slightly citrusy, more complex flavor than Mediterranean oregano. Whisk everything together until the spices are fully incorporated and the sauce looks uniformly speckled with the dried herbs.

Step 4: Rest and Adjust Consistency

Let the sauce rest for 10 minutes at room temperature. This allows the flavors to meld together and the spices to hydrate fully. You’ll notice the sauce thickens slightly as it sits.

After resting, give it another quick whisk. If it seems too thick for your liking, thin it with a splash of buttermilk. The ideal consistency should coat the back of a spoon but still be pourable. Taste and adjust the salt if needed—remember, you can always add more but can’t take it out.

Step 5: Chill Before Serving

Transfer the sauce to an airtight container and refrigerate for at least 30 minutes before using. Chilling is crucial—it lets all the flavors develop and marry together, transforming it from a simple mixture to that restaurant-quality sauce you’re after.

This sauce keeps beautifully in the fridge for up to 5 days. The flavors actually intensify over time, so don’t be surprised if it tastes even better the next day. Give it a good stir before each use, as some separation is natural.

Storing and Reheating plaza azteca white sauce

Fridge Storage

Transfer your sauce to an airtight container—I love using glass Mason jars for this. Store in the fridge at 40°F or below for up to 5 days. The flavors deepen over time, so it often tastes better the next day. ❄️

Freezer Storage

For longer storage, freeze in ice cube trays first, then transfer to a freezer bag. This sauce freezes well for up to 3 months without losing quality. Label with the date so you can track freshness easily.

Thawing Method

Move frozen sauce to the fridge and let it thaw overnight—about 8-12 hours. Avoid microwaving from frozen, as it can cause separation. Once thawed, give it a good stir before using.

Reheating Gently

Warm the sauce in a small saucepan over low heat, stirring constantly. Add a splash of buttermilk if it seems too thick. Never boil, as high heat can cause the dairy to curdle. 🔥

Room Temp Use

If using immediately after making, let it sit at room temperature for 30 minutes before serving. This takes the chill off and makes it more spreadable for tacos or enchiladas.

Reviving Separated Sauce

If your sauce separates after storage, don’t worry. Just whisk in 1-2 tsp buttermilk until smooth. The emulsion will come back together with a little patience and elbow grease.

Frequently Asked Questions