The baking time for a double batch of Ghirardelli brownies will depend on a few factors, including the size of the baking pan and the specific recipe you are using. However, as a general guideline, doubling the recipe typically does not require doubling the baking time.
Ghirardelli brownie recipes usually call for baking in a 9x13-inch baking pan. The recommended baking time for a single batch of Ghirardelli brownies in this size of pan is typically around 25-30 minutes. When making a double batch in the same pan, the baking time may increase slightly, but not necessarily double.
It's important to monitor the brownies closely as they bake. Start checking for doneness at around the original recommended baking time. Insert a toothpick or a cake tester into the center of the brownies, and if it comes out with a few moist crumbs clinging to it, the brownies are done. If the toothpick comes out clean, they may be slightly overbaked.
Keep in mind that ovens can vary, so it's always best to rely on visual cues and the toothpick test rather than strict time guidelines. Additionally, the specific recipe you are using may have its own recommended baking times, so it's a good idea to refer to the recipe instructions for the most accurate information.
Remember to let the brownies cool completely in the pan before cutting them to ensure they hold their shape. Enjoy your delicious double batch of Ghirardelli brownies!