How Do You Know If Cookie Bars Are Done?
To know if cookie bars are done, insert a toothpick or a cake tester into the center of the bar and pull it out. If it comes out clean, with no wet batter sticking to it, the cookie bars are done. The edges should be lightly golden, and the center should be set but still slightly soft. Overbaking can cause the bars to become dry or hard, so it’s important to keep an eye on them and check them periodically.