Heat the oven to 350 degrees.
Blend together the butter and cream cheese in a mixing bowl.
Beat in the milk.
Fold in the chicken, salt, pepper, green onions and bell pepper until well combined.
Open a can of the crescent roll dough, and lay it out flat on a countertop. Pinch together the seams of the triangles until you have one single piece of dough.
Slice the dough into four evenly sized rectangles.
Place a ¼ cup of the chicken mixture into the center of each rectangle.
Bring the corners of the rectangles up together, and pinch them closed.
Repeat these steps with the other can of crescent dough.
Place the croissants onto a parchment lined baking sheet, and brush with the beaten egg.
Bake for 13-15 minutes.
Let cool slightly and serve.