I am going to test out some versions with some high altitude adjustments (increase oven temperature, decrease baking time, decrease sugar, add eggs for liquid, and add a little extra flour) and I'll report back with my results.
High altitude adjustments for 7,000 feet: Reduce baking powder to 3/4 teaspoon Increase flour to 2 1/4 cups Increase eggs to 3 1/2 Reduce bake temperature to 325ºF