I found this recipe last week online. Let me tell you, these are the best cookies I’ve made in a long time, if not ever. Truly. We devoured the pan in one day. Well, I brought a few over to a friend’s house, but mainly we ate most of the pan. They are like a drug. You have a little and you just want more. I just made another batch. I’ll divide them for home and work. Then I will hide both containers! If you are going to a holiday party and what to win points with your friends. Bring these cookies. They are amazing.
These cookies are simple, but you have to be organized. I suggest having two mixing bowls, beaters, spatulas, and offset spatulas. Read the recipe through. You have to separate the yokes from the whites in two of the three eggs. You use the whole third egg. The whites are whipped up and then the brown sugar is folded into the egg white meringue. I forgot to mention there are two sugars being used: white granulated and light brown sugar. Don’t mix them up. I also used parchment paper in the pan. It makes lifting it out the pan easier. I thought there was potential for a gooey mess if I just greased the pan. I’m pretty sure I’m right.
You first make a cookie-like layer, topping it with mini-marshmallows and chocolate chips. The last step is covering this bad boy with the meringue and brown sugar mixture.
The name of these cookies is very odd. The website I got this recipe from discusses the origin of the cookie name. I think they are named after hens that got muddy. First they are a light brown, and then they become brown with specs. The name will definitely stimulate a conversation.

½ cup of butter, at room temperature
1 cup granulated sugar
3 large eggs, divided (1 egg, 2 yolks, and 2 egg whites)
1 tsp. vanilla extract
1 ½ cups all-purpose flour
1 tsp. baking powder
¼ tsp. salt
½ cup semi-sweet chocolate chips
1 cup mini marshmallows
1 cup light brown sugar

Preheat oven to 350 degrees F. Line a 9 x 13 pan with parchment paper, cutting the corners to fit into pan.

In a bowl, beat together butter and granulated sugar until creamy. Beat in 1 whole egg and 2 egg yokes. (Put the egg whites in another bowl to be made into meringue later.) Beat in the vanilla extract.
Add the flour, salt and baking powder to the butter mixture. Blended until just combined. This will be a thick batter. Place dollops of the mixture in the pan. This makes it easier to spread the dough. Spread evenly with a spatula or a knife. You may have to hold the parchment paper as you spread the batter. Sprinkle with marshmallows and chocolate chips.

Beat the egg whites in a clean bowl, with clean beaters until stiff peaks form. Gently fold in the brown sugar. Make sure you fold it and not stir it. You don’t want to deflate the egg whites. Try to contain your bliss at this point. Spread mixture evenly over marshmallows and chocolate chips. Bake for 30 minutes or until bars are a deep golden brown. If you can, let the bars cool completely. I find this to be rather a test of patience, but do try. Cut into squares and squeal with delight.
Store them in airtight container if there are any left. You will thank me later. The meringue will fall a little and crackle when you cut it. That means you did a great job and they are perfect.

Here is the original recipe. This is a fabulous website. Please visit it!