2 ounces crumbled blue cheese
1 teaspoon finely chopped fresh chives or scallions
2 tablespoons sour cream
2 tablespoons mayonnaise
1 1/2 teaspoons fresh lemon juice
1 tablespoon water
Dash of salt, if needed
Dash of ground black pepper
Place 1 ounce of the blue cheese, the chives, sour cream, mayonnaise, lemon juice, water, salt, and pepper in a wide-mouthed mason jar or cup that will fit an immersion blender without splashing. Blend with the immersion blender until combined.
Stir in the remaining 1 ounce blue cheese, as this dressing is best if it remains a bit chunky. Place a lid on the jar.
Allow the flavors to develop for 1 hour or more in the refrigerator. The dressing will keep for 1 to 2 weeks in the refrigerator.
Tip: Blue cheese varies greatly in saltiness and texture, so taste the dressing before adding salt and choose a variety that is crumbled or dry enough to crumble easily.