According to Girl Scouts of the USA, Girl Scouts have sold cookies since 1917. While today Girl Scout cookies are baked by two large commercial bakers — ABC Bakers and Little Brownie Bakers (owned by Kellogg's) — in the early days of the iconic fundraiser, the scouts themselves baked cookies at home, using their moms as their go-to "technical advisers." According to the same website, the Mistletoe Troop in Muskogee, OK was the first Girl Scout troop to bake and sell cookies to raise money.