2 ounces unsweetened chocolate, chopped (I didn't chop it)
4 ounces semisweet chocolate, chopped (I used chocolate chips)
1/2 cup unsalted butter (1 stick)
1 cup sugar
3 large eggs
1 tsp vanilla
1 cup flour
1/4 cup cocoa powder
1/2 tsp baking powder
3/4 tsp salt
18 large marshmallows

Just FYI, the recipe says that it makes 18 but I could only get 12 out of it

1. Preheat the oven to 375 and line a baking sheet with parchment paper

2. Place unsweetened and semisweet chocolate and butter in a med microwave safe bowl. Heat for about 2 minutes and then stir. Cook another 2 minutes in microwave until completely melted. Whisk in sugar, eggs and vanilla into the chocolate mixture until smooth. Sift flour, cocoa, baking powder and salt into another bowl. Gradually whisk dry ingredients into wet ingredients until moistened. Fold batter together using a rubber spatula. Do not overmix.

3. Drop heaping tablespoons of batter onto prepared pan 1" apart. Bake until cookies spring back when lightly touched, about 6-8 min. Cool cookies slightly

4. Transfer half of the cookies to a rack. Turn over remaining cookies on pan-flat side up. Place a marshmallow on top of each flipped cookie and return to oven. Cook until marshmallows begin to soften and puff about 3 minutes. Cool marshmallow topped cookies slightly about 2 minutes. Top with remaining cookies, pressing lightly to make sandwiches. Cool completely on wire racks and serve.

P.S. These are coming to work with me at 2100 so get ready my favorite guinea pigs.