Crumble the blue cheese and place in a small dish.
In a small mixing bowl, mix together buttermilk, 3oz of blue cheese crumbles, peppercorn, garlic powder, salt, and Worcestershire sauce using a hand mixer.
Then mix in sour cream and mayonnaise.
Pour into a small 12 ounce Mason jar and top of with a little more crushed peppercorn and the rest of your blue cheese crumbles.