I think that my life would be complete if I had the opportunity to eat chocolate chip cookie dough every 35 minutes. Actually, my life may be more complete if I simply did not think about eating cookie dough as often.

If you think about cookie dough as frequently as I do, I suggest heeding the following warning: turn away now...........from what you are doing and make these cookies. What is the alternative? Continuing to work on that boring excel spreadsheet and not make brownie cookies filled with cookie dough?

Brownie Cookies with [egg-less] Cookie Dough Filling

Make the cookies: Combine butter and chocolate chips in a medium saucepan and melt over medium heat, stirring frequently. Remove from heat and allow to cool, ~10-15 minutes. 

In a mixing bowl, whisk together flour, cocoa powder, baking powder, baking soda, and salt, set aside. In the bowl of a stand mixer, beat together sugars, eggs, and vanilla on medium-high speed until pale and fluffy, about 1 minute. Using a rubber spatula, fold and stir in melted chocolate mixture. 

Fold in 1/3 of the flour mixture at a time just until combined. Chill dough about 45 minutes (until it holds it's shape), preheating oven to 325 degrees while it is chilling.

Using a size 100 scoop (~1 tbsp), scoop dough onto Silpat or parchment lined baking sheets. Bake for 9 minutes, cool on baking sheet for a minimum 5 minutes before transferring to a rack to cool. Once cool, sandwich with chocolate chip cookie dough.

Make the frosting: In the bowl of a stand mixer, beat butter and sugars together on medium until light and fluffy. Beat in vanilla and milk/cream and mix until combined. Whisk together flour and salt and add to mixer; beat until combined. Add chocolate chips.

Cookies
1/2 cup unsalted butter
12 oz semi-sweet chocolate chips
1 1/2 cups all-purpose flour
1/4 cup unsweetened cocoa powder
1/2 tsp baking powder
1/4 tsp baking soda
1/2 tsp salt
1/2 cup packed brown sugar
1/2 cup sugar
3 eggs
2 tsp vanilla

Egg-less Cookie Dough
1 stick unsalted butter, room temperature
4 oz brown sugar (1/2 cup)
3.5 oz sugar (1/2 cup)
1 tsp vanilla
1.5 oz milk/cream
6 oz all purpose flour (1 1/3 cups)
1/4 tsp salt
1 cup mini chocolate chips