A balanced diet means a balanced diet that can include a variety of foods. About 80% of the daily diet should be natural products with minimal processing: whole grains, vegetables, fruits, berries, greens, meat, eggs, fish, nuts. But you should not categorically forbid either yourself or your child "food for joy", because any strict prohibitions can lead to eating disorders in the future: anorexia, bulimia, compulsive overeating. By the way, "healthy" food can also bring joy, because it can be prepared deliciously and with pleasure.