01 -
Preheat oven to 350°F (180°C) and line the bottom of a 9-inch cake pan with parchment paper and grease the sides.
02 -
In a medium-sized bowl, combine the flour, cocoa powder, baking soda, and salt. Set aside.
03 -
Add the butter and sugars to a large mixer bowl and beat together until light in color and fluffy in texture, about 2-3 minutes. Do not skimp on the creaming time.
04 -
Add the egg and vanilla extract and mix until well combined.
05 -
Add the dry ingredients to the butter mixture and beat just until combined. Use a spatula to gently finish combining everything to prevent overmixing the cookie dough.
06 -
Fold in the chocolate chips and candy corn. The cookie dough will be thick.
07 -
Spread the dough evenly into the prepared cake pan. Press a few more chocolate chips and candy corn into the top of the cookie cake, if desired.
08 -
Bake for 18-20 minutes or until it looks baked, but still wiggles a little when you jiggle it. Remove from oven and allow to cool completely in the cake pan, then transfer to a serving plate.
09 -
Add the butter to a large mixer bowl and beat until well combined and smooth. Add half of the powdered sugar and mix until smooth. Add the vanilla extract and a tablespoon of cream and mix until well combined. Add the remaining powdered sugar and mix until smooth. Add more cream to achieve the desired consistency.
10 -
Divide the buttercream evenly between two bowls. Color one with orange gel icing color and the other with yellow gel icing color. Create a two-toned frosting log using plastic wrap and pipe it onto the cookie cake using a piping bag with tip Ateco 844. Decorate with additional candy corn and chocolate chips, if desired.