I made this for a "We Treasure You" teacher end of year party. The base cake was vanilla with bc filling covered in bc and topped with brown sugar and raw sugar mixture for a sandy look. I made the map out of fondant. The treasure chest base was choc cake with vanilla bc filling covered in fondant pulled with a woodgrain technique. The lid was rice cereal and marshmallow covered in fondant. I used cardboard to make sure it was sturdy enough. Accents included chocolate shells, gumpaste crab, chocolate coins (store bought) and lollipop recipe gems - I bought a candy mold with small gems in assorted shapes and tinted the lollypop recipe different colors. All in all it tourned out fabulous and was a hit at the teacher luncheon but took many many hours of preparation and even a practice treasure chest to get it right.