We lived at sea level for years and I had the PERFECT chocolate chip cookie recipe. We even had a friendly "chocolate chip cookie bake-off" with some girlfriends (with our spouses as taste-testers) and ours came out the winner!
However, to my dismay, when we moved to 5,000 feet, my cookies were ruined! Ack! As you know, high altitude baking isn't just about adding more flour. That just doesn't cut it for me. I wanted my cookies to be perfect again! So, over the Holidays I played with the recipe quite a bit and Gourmet Dad finally declared them as good as the original. Success! We even made up a batch of these Ultimate High Altitude Cookies (well-reviewed!) to compare and we liked ours better.
So, if you're at high altitude, these are for you! Now I need to go loosen my belt from all those cookie batches we taste-tested...yep, someone had to do it. You can thank me later.
Preheat oven to 350 degrees. Whip butter until creamy, then add sugar and beat. Add salt, vanilla & egg. Sift flour and soda then add to mixture. Add chocolate chips and stir well. Bake 8-11 minutes (10 min 30 seconds in my oven) until edges are barely brown.