What was the significance of Miss Maudie's two little cakes and one large one?

Whenever Miss. Maudie made a cake, she would bake three smaller ones for the children. In this case, she only made two little cakes and invited Jem over. This is significant because the smaller cakes were only for Scout and Dill. She shared the larger cake with Jem, which acknowledged his new budding maturity...... he was no longer just one of the kids.