Riku only stayed around the bread long enough to make it, not wait for it to bake too. That was where his attention span died out.
Riku hummmed and hawed in a kind of exaggerated manner. Because he KNEW Sora would tease him about it. He just KNEW it. But... making Sora happy AND getting a Christmas make out session... Sora really had him wrapped around his finger.
"Fine," Riku surrendered, "Fine, you win, Sora. I'll do it. But NO ONE else is allowed in the kitchen while I do it."