Chipotle Ranch Dressing

Chipotle Ranch Dressing
1 chipotle chile from a can of chipotle chiles in adobo sauce
2 teaspoons fresh lime juice
1/4 cup chopped fresh cilantro leaves
1/2 cup mayonnaise
1/2 cup buttermilk
1/2 teaspoon ground cumin
1/2 teaspoon garlic powder
1/4 teaspoon dried oregano leaves, crumbled
1/2 teaspoon kosher salt, or to taste

Place all ingredients in a blender; cover then blend until smooth.  Use immediately or refrigerate in a covered container.  Dressing may be kept, refrigerated, for up to one week.