Eruv Tavshilin on a Dish Without Bread, and Wanting to Bake

I made an Eruv Tavshilin on a dish without bread, as I thought not to bake on Yom Tov, but then I changed my mind and decided to bake. Do I need to make an additional Eruv Tavshilin for the bread? And if so, do I need to bless again?

If it is still before nightfall, make an Eruv Tavshilin for the bread and say: "B'hadin Eruva Yehei Shara Lana L'afuyei," without a blessing. If you remember after nightfall, you can rely on the Eruv Tavshilin for the cooked dish.

Gemara Beitzah, page 15: "Beit Shammai says: two dishes, and Beit Hillel says: one dish. In the Gemara it is said, 'That which you bake, bake, and that which you cook, cook' — from here Rabbi Elazar said: one may not bake except on the baked, and one may not cook except on the cooked. From here the sages derived Eruv Tavshilin from the Torah. Rabbeinu Tam in Sefer HaYashar wrote that it implies that although Beit Shammai holds that one dish is needed, nevertheless, the cooked does not permit baking, and the baked does not permit cooking. However, Rabbeinu Yitzchak disagrees with him because in the Jerusalem Talmud, Tractate Beitzah, Chapter 2, 'That which you bake, bake, and that which you cook, cook' Rabbi Elazar says: bake on the baked and cook on the cooked, Rabbi Yehoshua says: bake and cook on the cooked. What is Rabbi Elazar's reason? 'That which you bake, bake, and that which you cook, cook'. What is Rabbi Yehoshua's reason? 'That which you bake, and that which you cook, cook'. And since Rabbi Elazar was from the school of Shammai, and the law is not like him, one dish is sufficient.