High Altitude

SARAH SAYS: The best reference information and and book I have found on the subject is Susan Purdy's website. The following has been posted with permission from Susan Purdy:
See also High Altitude Candy Sugar Syrup Chart - For Higher Altitudes: There are modifications that need to be made to candy recipes. For every 1,000 feet/300 meters above sea level, subtract 2 degrees F. For degrees C, for each 900 feet of elevation, subtract 1 degree C.

Adjustments

Altitudes

  3,000 ft 5,000 ft 7,000 ft 10,000 ft
Flour
Increase each cup by:
0 to 1 tablespoon 0 to 2 tablespoons 3 to 4 tablespoons 2 to 4 tablespoons
Baking Powder
or Baking Soda

Decrease each teaspoon by:
0 to 1/8 teaspoon 1/8 to 1/4 teaspoon 1/4 to 1/2 teaspoon 1/2 to 2/3 teaspoon
Sugar
Decrease each cup by:
0 to 1 tablespoon 0 to 2 tablespoons 2 to 4 tablespoons 3 to 4 tablespoons
Liquid
Increase each cup by:
0 to 2 tablespoons 2 to 4 tablespoons 3 to 4 tablespoons 3 to 4 tablespoons
Fats (may not be necessary)
Decrease each cup by:
0 0 0 1 to 2 tablespoons
in very high-fat cakes
and some cookies

Other Recipes