Whisk sour cream and mayonnaise in a mixing bowl until smooth with no streaks, about 30 seconds of vigorous whisking.
1 cup sour cream, 0.5 cup mayonnaise
Stir in minced garlic, lemon juice, salt, black pepper, and Worcestershire sauce (if using) until evenly distributed. Taste and adjust salt or lemon juice if needed.
1 clove garlic, 1 tbsp lemon juice, 0.25 tsp salt, 0.125 tsp black pepper, 0.5 tsp Worcestershire sauce
Crumble blue cheese into 3-5mm pieces directly into the bowl, then fold gently with a spoon to combine. Avoid overmixing to prevent the cheese from breaking down too much.
4 oz blue cheese
If the dip is too thick, stir in milk or buttermilk 1 tablespoon at a time until it reaches desired spreadable texture. Stop adding when the dip still holds its shape.
1-2 tbsp milk or buttermilk
Cover bowl tightly with plastic wrap and refrigerate for 1-2 hours. Stir once before serving and fold in fresh chives or parsley if using.
1 tbsp fresh chives or parsley
