Well, actually you can.  Like when you move from the Midwest to the mountains and all your recipes flop because of this thing called altitude.  
Well, all your baking recipes anyway!  
Thank goodness for the people who have lived here all their lives!  Here is my new favorite recipe for Chocolate Chip Cookies from highaltitudebaking.com 
Just in time for National Chocolate Chip Day!
Jumbo Chocolate Chip Cookies
© 1999 Letty                Flatt CHOCOLATE SNOWBALL 
ThreeForks Book/Falcon                Publishing
This home-size recipe from Letty                Halloran Flatt’s recipe book CHOCOLATE SNOWBALL, is altitude-adjusted for 3500 feet altitude and above; over 9,000                feet, you can cut 1 or 2 tablespoons of butter.
 
Yield: 12 jumbo (4-inch) or 24 medium cookies.
1/2 pound (2 sticks) unsalted butter, softened
3/4 cup sugar
3/4 cup firmly packed brown sugar
2 large eggs
1 1/4 teaspoons vanilla extract
3 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon salt
1 cup semisweet chocolate morsels
Preheat oven to 325°F. In the                large bowl of an electric mixer, cream the butter with both sugars                until light and fluffy. Beat in eggs and vanilla, then scrape sides                and bottom of bowl. Sift together flour, baking soda, and salt,                and mix them into the creamed butter. Scrape bowl. Stir in chocolate.
Line 3 large baking sheets with parchment                or oil lightly with canola oil. To make jumbo cookies, scoop dough                into twelve (1/3 cup) mounds, 4 to a sheet, 3 inches apart, or scoop                smaller cookies by the tablespoon. Bake until cookies are flat and                light golden brown, about 20 to 25 minutes, depending upon size.
 

 
