Bailey's mousse pie from Erica's Sweet Tooth is an Irish inspired dessert. An Oreo cookie crust is coated in chocolate glaze and topped with a light and fluffy Irish cream mousse. The mousse is made with a double boiler over the stove. If you do not own a double boiler, you can always use a pot with a metal bowl on top. This pie is so easy, you'll want to make it every St. Patrick's Day. For full recipe instructions, click here.