½ cup mayonnaise (110g)
½ cup buttermilk (120ml)
1 cup sour cream (220g)
½ tsp. celery seed (1g)
½ tsp. garlic powder (2g)
2 tbsp. grated onion (20g)
1 tbsp. cracked black pepper (6g)
¼ tsp. salt or to taste (1g)
Pinch sugar
Juice of 1 lime
1 extra-large ripe avocado
Blend together and chill before serving.