Emma, how do I adjust this for a 9" x 9" pan size? I have 4 of this size. These look very tall in the picture are the finished bars about 1" high?

hope this helps:

https://food52.com/blog/13239-how-to-make-your-baking-recipe-fit-your-pan-size

Hi! You can definitely bake this recipe in a 9x9-inch pan—the bars will just be a bit thinner. I would just keep a closer eye on the oven for the visual cues indicated in the recipe and check in a little earlier than indicated (e.g., for when the crust is "puffed and softly golden-brown" and the lemon curd is "slightly puffed and the center barely jiggles"). Hope that helps and happy baking!