Abstract: A barbecue cooking device (1) is disclosed. The barbecue cooking device comprises an inverted frustum casing (10) having a base wall (20), an open top (30) and a slanted side wall section (40) extending from the base wall (20) to the top (30), the slanted side wall section having an inner surface made of a material capable of reflecting radiant energy. A grill (60) mountable on the open top (30) is provided. The barbecue device further comprises a cup-shaped burner (70), with a bottom wall (72) and a side wall section (74), comprising a combustion chamber (76) in an upper portion thereof for burning a combustible material, thereby emitting thermal energy; an air chamber (78) located beneath the combustion chamber (76), the air chamber (78) having an air intake (82) for receiving air; and a diffuser plate (79) separating the combustion chamber (76) and the air chamber (78).