For the dip: Combine the buttermilk, mustard, egg yolk, horseradish and lemon juice in a food processor and process until the mixture forms a wet puree; add a few drops of water if needed. Drizzle in the oil until an emulsion is formed. Season with 1/2 teaspoon salt and a pinch of white pepper. Taste and add more lemon juice as needed. Chill until ready to serve.
For the beer-battered pickles: Heat the oil to 375 degrees in a deep-fryer or Dutch oven.
Whisk together the flour, sugar, baking powder, baking soda, cayenne, 1/2 teaspoon salt and a pinch of pepper. In a separate bowl, whisk together the beer and buttermilk. Stir the wet mixture into the dry mixture.
Pat the pickle spears dry with a paper towel, dust with a little flour and coat with the beer batter. Carefully drop the pickles into the hot oil and cook until golden brown, about 2 minutes. Season with salt and pepper. Serve with the dip.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Consumption of raw or undercooked eggs, shellfish and meat may increase the risk of foodborne illness.
Recipe courtesy of Jesse Kimball, Memphis Taproom, Philadelphia, PA