Start by selecting a medium-sized mixing bowl. This will give you enough space to blend the ingredients without any spills.

Spoon the mayonnaise into the mixing bowl. This will serve as the creamy base for your blackened ranch dressing.

Next, add the black pepper powder, onion powder, smoked paprika, cayenne pepper powder, dried dill weed, salt, garlic powder, and dried parsley to the bowl with the mayonnaise. These spices will provide the bold, smoky, and slightly spicy flavor characteristic of blackened ranch.

Using a whisk or a spoon, thoroughly mix the mayonnaise and dry spices together. Make sure the spices are evenly distributed throughout the mayonnaise, creating a smooth, uniform mixture.

Gradually pour the buttermilk into the bowl. The buttermilk will help to thin out the mayonnaise mixture, giving the dressing a pourable consistency while also adding a tangy flavor.

Gently fold in the sour cream to the mixture. The sour cream adds a rich, tangy element that complements the other ingredients, resulting in a creamy and flavorful dressing.

Once all the ingredients are in the bowl, use a whisk to blend everything together until the dressing is smooth and creamy. Ensure that no lumps remain, and all the ingredients are well combined.

After mixing, taste the dressing. If needed, adjust the seasoning to your preference by adding more salt, pepper, or spices. Mix again if you make any adjustments.

For the best flavor, cover the bowl with plastic wrap or transfer the dressing to an airtight container, then place it in the refrigerator. Let it chill for at least 30 minutes. This resting period allows the flavors to meld together, intensifying the taste of your blackened ranch dressing.

Once chilled, your blackened ranch is ready to serve! Use it as a dip, salad dressing, or a flavorful topping for your favorite dishes. Stir the dressing before serving if it has thickened or separated slightly in the fridge. Enjoy!