Rice Krispies Cake

• 1-24oz. box Rice Krispies cereal
• 1-16oz. box Fruity Pebbles cereal
• 1-16oz. bag marshmallows
• 2 sticks butter
• 1 tsp. vanilla extract
• 1 can white cake frosting

Melt butter in very large pot with vanilla. Add marshmallows and stir CONSTANTLY over medium heat. Remove from heat and add cereal. Fold in cereal with marshmallow mixture until well blended. Using a typical round cake pan, add half of mixture and press firmly. Add remaining mixture into another pan. Again, press firmly. Allow "cakes" to cool five minutes and then place them onto two separate dishes. Allow to cool for at least one hour. Frost as you normally would a two-tier cake.