Cover; cook on High heat setting 1 hour 45 minutes. Carefully remove slow cooker's ceramic insert, leaving cover on, and rotate insert 180 degrees; continue to cook on High heat setting until toothpick inserted in center comes out clean. Remove ceramic base from cooker to cooling rack; cool 15 minutes. Using parchment paper, carefully lift cake out of ceramic insert, and transfer to cooling rack. Remove parchment paper.