For the shrimp: Heat a large saute pan over high heat. Add the BBQ sauce and bring to a simmer. Add half of the shrimp in a single layer and cook on each side for 2 to 3 minutes. Transfer to a shallow serving bowl. Cook the remaining shrimp in the same manner and remove to the serving bowl.
Reduce the heat under the sauce to medium low. Add the butter and stir constantly until fully incorporated. Pour the sauce over the shrimp and garnish with minced parsley. Serve with slices of French bread for dipping.