lemon juice xxx
yes, but you may need to add more icing sugar to make it thick enough :)
Yes..... powdered sugar, confectioner sugar , icing sugar. Add water or juice and flavoring voila= icing
You add bubblegum extract to the icing sugar.
Using white icing you will have to add blue food coloring to it.
Yes, you can add sparkle/lustre dust to buttercream or royal icing. Simply add a little and mix well to create a shimmer. I have done this several times and unless you have a small amount of icing you will need a lot of the dust to really be able to see it.
You would not add any color to black to make grey icing, and once enough black coloring is added to reach a truly black icing, the only way to lighten it to grey would be to mix a tiny bit of the black icing into a great deal of white icing. The proper way to make grey icing is to simply add a very few drops of black to white icing to obtain the desired shade of grey.
To make icing thicker, you can add more powdered sugar or cornstarch to the mixture until you reach your desired consistency.
Glycerine is a viscose, clear, colourless liquid with a slightly sweet taste. It is mainly used to soften icing. It can be added to homemade royal icing to soften the icing, making it easier to eat.
Salt
Do you mean what is icing for a cake? Well basically to make icing from scrath you start off the same no matter what you make cake, cookies... etc butter and powered suger you have to make it be the consistency you want also add some Vanilla you made add some butter if you wish. If you would like chocolate just add chocolate now other icing like cream cheese I have no idea.
To make buttercream icing thicker, you can add more powdered sugar or reduce the amount of liquid ingredients like milk or cream. This will help to achieve a thicker consistency for your icing.
Red mixed with a little water will make a pink color. If you are making icing, add a drop of two of red food coloring to white icing in order to turn the icing pink.