Step 4: Prepare your Styrofoam or Cardboard Holder
Then I took one of my cookie sticks and used it to make sure they would go all the way through the top hole and at least partially into the second. They will be heavy, brownies are dense already, and you want them to stay standing and not hit each other.
If you are using Styrofoam, use the cookie sticks to start the holes. The sticks are fatter so they probably won't just go in the styrofoam and you don't want to be struggling with it later when you have a heavy, wet brownie pop to deal with.