Question: To attach the bottom of the mushroom cookie to the top
Options:
Take a bottom part of the mushroom, add a little frosting to glue the top part on, and then push on the cookie.
Take a bottom part of the mushroom, add a little super glue to keep the top part on, and then push on the cookie.
Answer: Take a bottom part of the mushroom, add a little frosting to glue the top part on, and then push on the cookie.