1/2 c. horseradish
4 c. mayonnaise
1 c. sour cream
3/4 c. buttermilk
1/2 c. oil
1 tsp. onion powder
1 tsp. salt
1/2 tsp. pepper
3/4 tsp. kelp
1/4 c. vinegar

Stir with whip. Refrigerate.