Step 1

Make the Rémoulade Sauce: Pulse all ingredients except salt and pepper in food processor until well combined but not smooth, about ten 1-second pulses. Season with salt and pepper to taste. Transfer to serving bowl and refrigerate until ready to serve (the rémoulade can be refrigerated for up to 3 days).

Step 2

Make the Crab Cakes: Place ¾ cup panko in small zipper-lock bag and finely crush with rolling pin. Transfer crushed panko to 10-inch skillet and add remaining ¾ cup panko. Toast over medium-high heat, stirring constantly, until golden brown, about 5 minutes. Transfer panko to shallow dish and stir in ¼ teaspoon salt and pepper to taste. Wipe out skillet.

Step 3

Pulse celery, onion, and garlic in food processor until finely chopped, 5 to 8 pulses, scraping down bowl as needed. Transfer vegetables to large bowl. Melt butter in now-empty skillet over medium heat. Add chopped vegetables, ½ teaspoon salt, and 1/8 teaspoon pepper; cook, stirring frequently, until vegetables are softened and all moisture has evaporated, 4 to 6 minutes. Return vegetables to large bowl and let cool to room temperature. Rinse out pan and wipe clean.

Step 4

Pulse shrimp in now-empty food processor until finely ground, 12 to 15 pulses, scraping down bowl as needed. Add cream and pulse to combine, 2 to 4 pulses, scraping down bowl as needed. Transfer shrimp puree to bowl with cooled vegetables. Add mustard, hot pepper sauce, lemon juice and Old Bay seasoning; stir until well combined. Add crabmeat and fold gently with a rubber spatula, being careful not to overmix and break up lumps of crabmeat. Divide the mixture into 8 balls and firmly press into 1/2-inch-thick patties. Place cakes on rimmed baking sheet lined with parchment paper, cover tightly with plastic wrap and refrigerate for 30 minutes.

Step 5

Coat each cake in panko, firmly pressing to adhere crumbs to exterior. Heat 1 tablespoon oil in now-empty skillet over medium heat until shimmering. Place 4 cakes in skillet and cook without moving them until golden brown, 3 to 4 minutes. Carefully flip cakes, add 1 tablespoon oil, reduce heat to medium-low and continue to cook until second side is golden brown, 4 to 6 minutes. Transfer cakes to platter. Wipe out skillet and repeat with remaining 4 cakes and remaining 2 tablespoons oil. Serve immediately with the rémoulade sauce and lemon wedges.