General Tips for Adapting Sea Level Pastry Recipes to Altitudes Above 3,000 feet:
Reduce the sugar in your recipe 1 to 3 tablespoons per each cup of sugar used.
Increase the liquid by 1 to 4 tablespoons.
Reduce each teaspoon of baking powder by 1/8 to 1/4 teaspoon.
Increase oven temperature by about 25 degrees F.