These Flourless Chocolate Cookies have a crispy meringue exterior, fudgy and brownie-like on the inside. They melt in your mouth and are insanely delicious!
Preheat the oven to 375 degrees Fahrenheit and line two baking sheets with parchment paper.
Melt the semi-sweet chocolate in the microwave in 30-second intervals until completely melted. Set aside and let cool while you whip up the egg whites.
In a large bowl, add the egg whites and cream of tartar. Use a hand mixer or stand mixer fitted with the whisk attachment to whip until foamy. Add the powdered sugar slowly while whipping, letting it all be absorbed. Whip until you reach medium-soft peaks.
Sift in the cocoa powder and whip slowly until it is absorbed into the egg whites. The mixture will seem much too soft to scoop into cookies, but it will thicken after the melted chocolate is added.n
Fold in the cooled, melted chocolate until mostly combined. Add in the chopped chocolate and continue folding until completely combined.
Use a large cookie scoop, about 2 1/2-3 tablespoons, to scoop the dough onto the prepared baking sheets, leaving at least 2 inches between them.
Bake for 10-11 minutes, until the tops are crackling and the edges are just set. Remove from the oven and let the cookies sit on the baking sheet for another 10-15 minutes, until cooled. They will continue to bake and set up as they cool down.