Prep your ingredients: Ensure egg yolks are at room temperature for best emulsion.
Start the emulsion: In a medium mason jar, using an immersion blender, whisk together egg yolks, oil, lemon juice, mustard, and salt until smooth.
Perfect the texture: Your mayo is done when it's thick, creamy, and holds its shape. If it breaks, don't panic – add another egg yolk and whisk to re-emulsify.
Assemble the Ranch Dressing:
Combine base ingredients: In a medium bowl, whisk together your fresh mayonnaise, raw milk, and sour cream until smooth.
Add seasonings: Sprinkle in your ranch seasoning mix and whisk thoroughly.
Taste and adjust: Sample your dressing and adjust seasonings as needed. Want more tang? Add a squeeze of lemon. Need more herbs? Boost the dill and parsley.
Let it rest: Cover and refrigerate for at least 30 minutes to allow flavors to meld. The longer it sits, the better it gets!