Unflavored powdered gelatin gives cake decorating gel the supple texture and density needed to create line art and lettering on baked goods. Decorating gel doesn’t add flavor, just color and sweetness, so you need only a couple of ingredients to mix up your own batch and adapt it to match any type of cake. Make a large batch of clear decorating gel and divide it into as many portions as you need colors for your project.
Things You'll Need
Whisk unflavored powdered gelatin into water in a medium saucepan. You need 1 tablespoon of water per envelope of gelatin; one envelope of gelatin makes enough icing for one 12-inch cake when used for line art or writing.
Heat the gelatin and water over medium heat until steam forms. Whisk in 1 cup of light corn syrup for every package of gelatin used.
Heat the gel until steam rises again, then take the saucepan off the burner and stir occasionally as the gel cools. Divide the clear decorating gel into small bowls; use one bowl for each color of decorating gel you want.
Mix 1 drop of liquid food coloring into each bowl of clear decorating gel using a toothpick. Stir until color is evenly distributed, with no streaks. Add more liquid food coloring if necessary, a drop at a time, until you reach your desired shade.
Store unused decorating gel in airtight containers or plastic bags in your refrigerator for up to one month.
You don’t need a special piping bag to use your homemade decorating gels. Just put some decorating gel in a sandwich bag, squeeze the air out and squish the gel down into a bottom corner of the bag. Push the gel back a little from the very tip of that corner and then cut the tip off. You now have a disposable decorating gel piping bag, suitable for writing words or drawing line art on cakes.
Store clear decorating gel in airtight containers or resealable bags in the refrigerator for up to one month and add coloring before using.
Add flavor to your decorating gel by incorporating vanilla, almond or other extract into it when you color it.