Surprise Cookies
Jen Walsh
Martha Stewart
Makes about 2 1/2 dozen
For the cookies:
1 3/4 cup flour
3/4 cup unsweetened cocoa powder
1/2 tsp. baking soda
1/2 tsp. coarse salt
1/2 cup (1 stick) unsalted butter, room temp.
1 cup granulated sugar
1 large egg
1/2 cup whole milk
1 tsp. pure vanilla extract
About 15 large marshmallows, halved crosswise
For the frosting:
3 cups confectioner's sugar
6 Tbs. unsalted butter, room temp.
1/4 cup plus 1 1/2 tsps. unsweetened cocoa powder
1/4 cup plus 2 Tbs. whole milk
3/4 tsps. pure vanilla extract
1. Preheat oven to 375 degrees. Make cookies: Sift together flour, cocoa powder, baking soda, and salt into a bowl.
2. Put butter and sugar into the bowl of an electric mixer fitted with the paddle attachment. Mix on medium-high speed until fluffy, about 2 minutes. Reduce speed to medium-low; mix in egg, milk, and vanilla. Mix in flour mixture, 1/2 cup at a time until combined.
3. Drop dough onto baking sheets lined with parchment paper, spacing 2 inches apart. Bake cookies, rotating sheets halfway through until firm, 8-10 minutes. Immediately press a marshmallow half on top of each cookie. Bake until marshmallow begins to melt, 2 minutes more. Let cool completely on wire racks.
4. Make frosting: Put confectioner's sugar in a medium bowl. Melt butter with the cocoa powder in a saucepan over medium heat, stirring occasionally. Add butter mixture to the confectioner's sugar. Whisk in milk and vanilla.
5. Spread about 1 Tbs. of frosting on top of each cookie to cover marshmallow. Let stand until set, about 10 minutes. Cookies can be stored in single layers in airtight containers at room temperature up to 2 days.