Preheat oven to 350º F. Line 2 large baking sheets with parchment paper.
In a medium bowl, sift together flour, cocoa powder, baking powder, baking soda and salt. Set aside
In a large bowl, cream butter, granulated sugar, and brown sugar together with an electric mixer at medium speed until light and fluffy, about 2-3 minutes.
Add eggs, one at a time, beating at medium speed until smooth. Add vanilla and beat just until combined.
Add flour mixture and beat at low speed, just until combined.
Stir in chocolate chunks, pretzels, caramel bits, chocolate rice cereal and peanuts.
Scoop 1/4 cup portions of cookie dough and place 2 inches apart on prepared baking sheets. Bake for 13-15 minutes, until set. Cool on cookie sheets for 1 minute before transferring to wire rack to cool.