Salads
This creamy black and blue salad dressing recipe transforms ordinary greens into a vibrant, velvety masterpiece with just 10 minutes of prep. The secret lies in blending ripe avocado with tangy blue cheese and a touch of buttermilk, creating a luscious texture that coats every leaf.
I developed this recipe after craving something richer than traditional vinaigrettes but lighter than ranch—perfect for hearty salads or as a dip for crispy vegetables.
The dressing achieves its signature deep purple swirls from a splash of black vinegar and purple cabbage juice, adding visual drama without overpowering the creamy base. The blue cheese contributes a sharp, salty depth, while the avocado provides a smooth, buttery richness that balances the tang.
This isn’t just dressing—it’s a flavor experience that elevates simple greens into a restaurant-worthy dish.
What makes this recipe stand out is its versatility—it works equally well on kale salads, as a dip for grilled chicken, or even as a topping for baked potatoes. The avocado base keeps it creamy for days, and the acidity from the vinegar prevents separation.
No special tools are needed; just a blender and a few pantry staples transform into something extraordinary.
Once you taste this dressing, you’ll never go back to store-bought versions. The creamy texture and bold flavors make it a game-changer for any meal, and it stores perfectly in the fridge for up to 5 days. Let’s make it—your salads will never be the same.
Ingredients for black and blue salad dressing
Ten ingredients blend into this velvety dressing—creamy, tangy, and packed with deep purple swirls.
| Ingredient | Amount | Notes |
|---|---|---|
| Ripe Avocados 🥑 | 2 whole | Pitted, skin removed, flesh scooped |
| Blue Cheese Crumbles 🧀 | 1 cup | High-quality aged blue cheese |
| Buttermilk 🥛 | ½ cup | Full-fat for creaminess |
| Black Vinegar 🍶 | 1 tbsp | For signature purple swirls |
| Purple Cabbage Juice 🧅 | 2 tbsp | Freshly extracted or bottled |
| Extra-Virgin Olive Oil 🫒 | ½ cup | Light, fruity variety |
| Fresh Lemon Juice 🍋 | 2 tbsp | Freshly squeezed |
| Garlic Cloves 🧄 | 2 cloves | Fresh, peeled, roughly chopped |
| Diamond Crystal Kosher Salt 🧂 | ½ tsp | Adjust to taste |
| Freshly Ground Black Pepper 🌶️ | ¼ tsp | Freshly cracked |
The avocados are non-negotiable—ripe but firm is key. Trader Joe's or Whole Foods carry the best quality, but any store with a produce section works. Look for avocados that yield slightly to gentle pressure. For blue cheese, Gorgonzola Dolce or Stilton add extra depth, but classic blue cheese crumbles work too. Fresh purple cabbage juice is magical for those signature swirls—if you can't find it, bottled beet juice works in a pinch, though it's not identical. The olive oil should be light and fruity; California extra-virgin brands shine here.
No black vinegar? Balsamic glaze adds a similar depth, though it won't create the same purple swirls. Swap buttermilk for plain yogurt thinned with water if needed, but trust me on the full-fat version—it's worth the extra creaminess. The garlic can be roasted for a sweeter note, or left raw for a sharper kick. If you're sensitive to heat, reduce the black pepper to a pinch or skip it entirely. For extra tang, add 1 tsp of Dijon mustard to the blend. The dressing should coat the back of a spoon—if it's too thick, thin with 1 tsp of water at a time.
This dressing keeps beautifully for 5 days in the fridge, sealed tightly with a layer of olive oil on top to preserve freshness. For longer storage, freeze in ice cube trays—thaw and whisk before using. The avocado base means it's best used within a week, but the acidity from the vinegar and lemon prevents separation. I always make a double batch—half for salads, half for dipping grilled shrimp or veggies. The purple swirls fade over time, but the flavor stays rich and creamy.
Why You'll Love This Recipe
- No Blender Needed: I swear by this trick—just mash the avocado with a fork right in the bowl. No pulsing, no straining, no cleanup. The blue cheese crumbles blend right in with the buttermilk like magic, and the purple cabbage juice adds that deep hue without extra work.
- Umami Bomb: That first tangy bite? Chef’s kiss. The black vinegar cuts through the richness of the blue cheese while the avocado keeps it velvety, and the purple cabbage juice adds a subtle sweetness that ties it all together. It’s the kind of dressing that makes you reach for seconds—even if you’re not supposed to.
- Weeknight & Party Star: Drizzle this over greens for a quick lunch, toss it with grilled chicken for dinner, or serve it as a dip with crusty bread at your next gathering. Honestly, I’ve used it in everything from charcuterie boards to pasta salads, and it never lets me down.
- Fridge-Friendly Magic: Make a big batch and store it for up to 5 days—it actually gets better as the flavors meld. The buttermilk keeps it creamy without separating, and the avocado’s healthy fats make it a budget win for flavor-packed meals. (Yes, even on a Tuesday night.)
Step-by-step instructions for black and blue salad dressing
Here's how to blend this velvety dressing with striking purple swirls and bold blue cheese flavor.
Halve and Mash the Avocados
Cut the 2 whole ripe avocados in half lengthwise, remove the pits, and scoop the flesh into a food processor. I like to use a sharp paring knife for this—it gives you clean access to all that creamy avocado goodness. Leave the skin on the halves to protect the avocado from oxidation while you work.
Mash the avocado flesh with a fork or pulse briefly in the food processor until it reaches a smooth but slightly textured consistency—think of it like thick guacamole. You want some body to help emulsify the dressing later, but not completely smooth. This texture helps create that signature creamy mouthfeel.
Add Wet Ingredients and Process
Add the 0.5 cup buttermilk, 2 tbsp fresh lemon juice, 1 tbsp black vinegar, and 2 tbsp purple cabbage juice to the food processor with the avocado. The black vinegar might look unusual, but it's what creates those signature purple swirls when combined with the cabbage juice. Pulse everything together until fully combined and smooth.
This is where the magic starts happening. The acidity from the lemon juice and vinegar will begin to break down the avocado's cell walls, creating that luxurious creaminess we're after. If you're using a food processor, scrape down the sides with a spatula to ensure all ingredients get incorporated evenly.
Incorporate Aromatics and Cheese
Add the 2 cloves roughly chopped garlic, 0.5 tsp kosher salt, and 0.25 tsp freshly ground black pepper to the processor. Pulse just until the garlic is finely minced—you don't want to over-process it or it'll turn bitter. With the processor running on low speed, slowly drizzle in the 0.5 cup extra-virgin olive oil while scraping down the sides continuously.
Next, add the 1 cup blue cheese crumbles through the feed tube while the processor is running. This gradual addition prevents the cheese from clumping together. The blue cheese will give your dressing that signature tangy, umami depth that pairs perfectly with the creamy avocado base. You'll know it's ready when the mixture is completely smooth and well-emulsified.
Adjust Consistency and Taste
Transfer the dressing to a bowl and taste immediately. The avocado's natural richness should balance perfectly with the sharp blue cheese and tangy vinegar. If it needs more acidity, add another 1 tsp of lemon juice or black vinegar. For more creaminess, add 1 tbsp of buttermilk or a small piece of avocado.
If the dressing is too thick, thin it with 1-2 tbsp of water or additional buttermilk until it reaches a pourable consistency that coats the back of a spoon. Remember, this dressing should cling beautifully to your salad greens while maintaining that luxurious texture. The ideal consistency is like heavy cream—thick enough to coat but still pourable.
Swirl and Serve
Transfer the dressing to a serving bowl or airtight container. Using a spoon, gently swirl the dressing in circular motions to create those signature purple streaks from the cabbage juice. This isn't just for looks—it also helps distribute the flavors evenly throughout.
Let the dressing sit at room temperature for at least 15 minutes before serving to allow the flavors to meld completely. The avocado will darken slightly, but this doesn't affect the taste—it's just the natural oxidation process. Serve immediately over mixed greens, grilled chicken, or your favorite salad base for that perfect balance of creamy, tangy, and umami flavors.
Pro Tips For Making Black And Blue Salad Dressing
- Mash the Avocado Last: I learned this the hard way—adding avocado too early turns your dressing into a sad, watery sludge. Wait until you’ve mixed everything else, then fold it in just before serving. The texture stays creamy, not mushy.
- Use Cold Buttermilk: Room-temperature buttermilk makes the dressing separate like a bad divorce. Grab it straight from the fridge and let it sit in the bowl for 30 seconds—just enough to chill the other ingredients slightly. Trust me, the tang stays sharper.
- Strain the Cabbage Juice: Skip the fibrous bits from purple cabbage and your dressing will be silky, not gritty. Fold the raw cabbage into a cheesecloth, squeeze it dry over a bowl, and measure the juice. Yes, it’s messy, but the result is worth it.
- Balance the Vinegars First: Black vinegar’s bold flavor can overpower if you’re not careful. Mix it with the purple cabbage juice before adding the buttermilk and blue cheese, then taste. Adjust with a splash of water if it’s too sharp—better to dilute now than regret later.
Flavor customization for this recipe
Tangy Twist Options
Swap the black vinegar for white balsamic vinegar if you prefer a sweeter tang—it won’t create purple swirls but adds depth. For extra zing, add 1 tsp of apple cider vinegar to brighten flavors.
I once used rice vinegar for a milder acidity that still balanced the blue cheese beautifully. 🍶
Creamy Variations
Replace buttermilk with Greek yogurt for a thicker texture, or use sour cream for extra richness. For a dairy-free option, blend silken tofu with lemon juice until smooth before adding other ingredients. The avocado base keeps it creamy even without dairy. 🥛
Cheese Alternatives
Swap blue cheese for feta (crumbled) for a milder tang, or use Gouda (shredded) for a nutty depth. For a vegetarian option, try vegan blue cheese—it lacks the same punch but still adds complexity. Always adjust salt to taste when using different cheeses. 🧀
Herb Infusions
Add 1 tbsp fresh dill or chopped chives for a bright herbal note. For warmth, stir in 1 tsp smoked paprika or ½ tsp dried thyme. Fresh herbs should be added at the end to preserve their aroma. I love adding cilantro for a fresh, almost citrusy contrast. 🌿
Sweet Contrasts
Drizzle in 1 tsp honey or maple syrup to balance sharpness, especially if using feta instead of blue cheese. For a smoky-sweet touch, add ½ tsp smoked sea salt and a pinch of cinnamon. The sweetness rounds out the dressing’s bold flavors. 🍯
Spicy Kick
Add ½ tsp hot sauce or 1 finely chopped jalapeño for heat. For a subtle burn, mix in ½ tsp cayenne pepper or 1 tsp sriracha. Always taste first—spicy elements can intensify after resting. I recommend starting with ¼ tsp if you’re sensitive to heat. 🌶️
Nutrition facts
Frequently asked questions
Why does this dressing have purple swirls?
The signature purple streaks come from blending black vinegar with purple cabbage juice. The acidity in the vinegar reacts with the cabbage's anthocyanins, creating those vibrant swirls when swirled into the creamy base. It's purely decorative but adds visual drama to any salad!
Can I make this dressing without a food processor?
Use a blender or even a sturdy whisk in a bowl. For best results, mash the avocado first with a fork, then whisk in the remaining ingredients one at a time. The texture will be slightly less smooth, but you'll still get that rich, creamy dressing. Just be patient and whisk vigorously for 2-3 minutes to emulsify properly.
How do I prevent the avocado from turning brown?
Keep the avocado pits in the halves until ready to use, and work quickly once exposed. For extra protection, brush the cut avocado with a little lemon juice before scooping out the flesh. Store any unused avocado in an airtight container with plastic wrap pressed directly against the flesh. The dressing's acidity will help preserve color too!
What's the best way to store leftovers?
Transfer to an airtight container and press a layer of olive oil on top to prevent oxidation. It keeps fresh in the fridge for 5 days—shake well before using as the avocado may separate slightly. For longer storage, freeze in ice cube trays and thaw overnight in the fridge. The texture may soften slightly after freezing.
Can I use this dressing on non-salad dishes?
This creamy dressing works beautifully as a dip for grilled vegetables, crudités, or even baked potatoes. Try drizzling it over seared scallops or using it as a sandwich spread with roast beef. The rich flavors complement both savory and slightly sweet dishes.