Preheat the oven to 375 degrees and grease a medium jelly roll pan (I use a Pampered Chef stoneware pan - it's something like 8" x 12").
Arrange the cookies in the pan - 5 rows, 5 cookies per row. Set aside.
25 Nutter Butter cookies
In a medium bowl, add the brownie mix, water, oil, and eggs. Stir until combined (I use a spatula) - about 50 strokes.
1 pack, 1/4 cup water, 2/3 cup vegetable oil, 3 eggs
Pour the brownie batter over the cookies and spread evenly with the spatula. I had too much batter (about a cup) that I made separately in a small pan.
Bake for 18-20 minutes or until a toothpick inserted in the brownie portion comes out clean.
Once done, remove from the oven and immediately sprinkle the chocolate chips evenly over the brownie. Let them melt for about 3 minutes then spread the chocolate over the top. It should spread easily if you let them melt enough. Once spread evenly, sprinkle the crushed peanuts over the top.
1 1/2 cups chocolate chips, 1/4 - 1/2 cup peanuts
Let cool and then slice into bars. I popped mine into the fridge to set up quicker and they sliced easily.