Preheat oven to 350°. Line 3 large baking sheets with parchment paper.
Divide each log of cookie dough into 2 balls. On each baking sheet, place two cookie dough balls and flatten them into big discs.
Bake for 15-20 minutes until golden and cooked through. (Now is not the time for an under-baked gooey center!) Let cool for about 15 minutes on baking sheet then transfer on a cooling rack to cool completely.
Meanwhile, make frosting: In a large bowl, combine butter, powdered sugar, vanilla, and salt. Beat until light and fluffy. Gradually add milk until you reach your desired consistency.
Assemble cake: On a cake stand, or large serving dish, apply a very thin layer of frosting then place the first cookie layer on top. Apply a thin layer of frosting on top of the cookie and top with another cookie layer. Repeat with remaining cookies and frosting.
Recipe by 5* trending recipes with videos at https://food.theffeed.com/2019/05/27/chocolate-chip-cookie-cake/