Easy Cake Decorating Save on time and supplies with my cake decorating tip. All you need are some cake tips (plastic or metal), ziplock bags, frosting and a coffee cup. Cut a VERY small hole into the corner of a ziplock baggy. Poke your cake tip through only 1/3 of the way. (Sorry for the bad photo, maybe I’ll post a different one later.) Place the baggy (cake tip at the bottom) into a coffee cup as pictured. Then fill it up with the frosting. I usually put 5-6 spoonfuls in the bag to start with. Don’t let the frosting come out of the open top of the baggy! I gently squeeze it like a toothpaste tube. Practice makes perfect! The bonus of using a ziplock baggy is, you don’t have to wash it! I soak my cake tips in a small cup of warm water and dish soap. This makes clean up super easy.