All recipes on Curly Girl Kitchen are developed for high altitude at 5,280 feet.
Note: I used an 8 1/2 x 11 inch baking dish for these bars. If you don't have this size, use a 9 inch square baking dish instead. The bake time should be about the same, or 1-2 minutes longer, since the bars will be slightly thicker. For more bars that are slightly thinner, you can bake them in a 9x13 pan for 25 minutes.