Step 1

Preheat oven to 375 degrees F (190 degrees C). Line a baking dish with aluminum foil.

Step 2

Combine cream cheese, crab meat, artichoke bottoms, 6 ounces Cheddar cheese, red bell pepper, green onions, sour cream, mayonnaise, garlic, lemon zest and juice, tarragon, Worcestershire sauce, and cayenne pepper in a large bowl; season with salt and black pepper.

Step 3

Cut the top 1/3 off the loaf of sourdough bread and discard. Remove the bread filling and discard, leaving just the crust. Place in the prepared baking dish.

Step 4

Transfer artichoke mixture to the prepared bread bowl; top with 2 tablespoons Cheddar cheese and cayenne pepper.

Step 5

Bake in the preheated oven until dip is warmed and top is golden brown, about 30 minutes.