Here is a tutorial for my readers who are brand new to cake decorating.
In addition to the decorating tip you will be using, you will need couplers, scissors, and disposable decorating bags.
Step 1.In order to see how much you will need to trim from the end, slide the coupler (make sure to remove the coupler ring) through the end of the bag. Press the coupler to the bottom until it will slide no further. You will notice that this will create a small indentation in the plastic of the bag.
Step 2: Cut the end where the small indentation is and then slide the couple through the top until it sets in place at the other end of the bag.
Step 3: Place the tip on the outside of the bag and onto the end of the coupler. Take the coupler ring and place it over the tip and screw it on to the coupler.You will want to make sure that there are no gaps between the coupler, the tip, and the ring as this could cause leaks.
4. Fold the other end of the bag over and fill with frosting using a spoon or spatula.