Flourless Chocolate Cookies

I've been looking at a picture of these cookies for a couple of months.   I love the fact that these cookies only have a few ingredients and are a great gluten and dairy free option for people that need those options.  For the people that just like chocolate cookies... these are great for that too.

Flourless Chocolate Cookies:
(King Arthur Flour)

2 1/4 cups confectioners' sugar
1/4 teaspoon salt
1 teaspoon espresso powder, optional but good
1 cup cocoa powder, Dutch-process (European-style) preferred*
3 large egg whites
2 teaspoons gluten-free vanilla extract

Preheat the oven to 350°F. Lightly grease two baking sheets. Or line with parchment, and grease the parchment.

Stir together all of the ingredients till smooth. Scrape the bottom and sides of the bowl, and stir again till smooth.

Drop the soft, batter-like dough onto the prepared baking sheets in 1 1/2" circles; a tablespoon cookie scoop works well here.

Bake the cookies for 8 minutes; they should spread, become somewhat shiny, and develop faintly crackly tops.

Remove the cookies from the oven, and allow them to cool right on the pan.