Pour batter evenly into 2 (1.5-liter) greased and floured ovenproof bowls.
Bake at 325° for 1 hour and 5 minutes to 1 hour and 15 minutes or until a wooden pick inserted in center comes out clean. Cool in bowls on wire racks 10 minutes. Remove from bowls; let cool completely on wire racks, large flat sides down. Using a serrated knife, carefully cut domed tops (about 3/4 to 1 inch) off each cake to make level. Cut 1 cake top with a 3-inch round cutter, and reserve for teapot lid.
Stir together violet food-coloring paste and 3 cups Creamy Frosting until well blended, and set aside.
Stir together lime green food-coloring paste and remaining 1 cup Creamy Frosting until well blended; set aside.
Transfer 1 cake half, large flat side up, to a serving platter; spread sides with 1 cup violet frosting; spread top with 1/2 cup violet frosting. Top with remaining cake, large flat side down. Spread top and sides with 1 1/4 cups violet frosting. Place reserved round cake lid on top of cake. Spread with 1/4 cup violet frosting.
Insert 1 wooden skewer halfway horizontally into middle side of cake; attach Teapot Spout, pressing gently. Insert 2 wooden skewers, 3 inches apart on opposite side of spout; attach Teapot Handle, pressing gently. Pipe border of dots around bottom edge of cake and cake lid with lime green frosting. Press Fondant Daisies and Butterflies onto cake as desired.
Though the butterflies are made of fondant, the finished versions contain plastic stamens and should not be eaten.