A few years ago, I was inspired by some fractal cookies on Evil Mad Scientist. I decided to make a triangular version. I wasn't an instructables member back then, so I didn't think of taking pictures of the step by step process. I did upload pictures of my cookies to our flickr stream, though.
Now that it's holiday cookie season, I figured it was time to make another batch.
I'm particular about cookie recipes. I won't use shortening or artificial flavoring. This recipe is adapted from Alton Brown's sugar cookie recipe.
You will need:
1 C plus 2 T butter
1 C granulated sugar
3 C flour
3/4 t baking powder
1/4 t salt
1 T milk
1-3 t vanilla extract
1-2 t peppermint mint extract
1/2 C powdered sugar
1/2 C cocoa powder (I used the extra dark)
a few drops green food coloring
Step 1: Cream butter and sugar
Beat 1 C of the butter until it becomes fluffy and lighter colored. Add the granulated sugar and keep beating. The sugar granules cut air pockets into the butter, which helps make a nice structure for the cookie and helps incorporate the other ingredients evenly.
Add the egg and beat more. The dough usually gets gooey and then fluffy again when you add the egg.
Step 2: Add other stuff
Mix very thoroughly. The dough will be crumbly looking at first, but should come together. You should be able to squish it together, but it shouldn't be so soft that it can't hold its shape.