These Brownie Marshmallow Cookies are a nostalgic treat that combines rich chocolate flavor with gooey marshmallow and a layer of frosting. The soft, brownie-like cookies are baked, topped with marshmallows, and finished with a sweet swirl of chocolate icing. They’re perfect for sharing and even better with a cold glass of milk!
With a mixer, cream together butter and sugar. Add egg and vanilla extract; mix well.
In a bowl, whisk together flour, salt, soda, and cocoa.
Add dry ingredients to butter mixture in thirds alternating with the milk. Stir in nuts if desired.
Drop by teaspoon (I use my cookie scoop) onto a greased cookie sheet approximately 2 inches apart. Bake at 350 degrees F for 9 minutes and remove from oven.
Immediately place a marshmallow piece (place with the sticky cut side down) on the top of each cookie and bake for 2 more minutes. When cookies are cool, frost each cookie with frosting. Makes 2 1/2 dozen.
For the frosting: Mix ingredients together well and frost tops of cooled cookies.