A suitable corn syrup substitute for icing is honey or maple syrup.
If you are making icing, yes. If you are making a meringue, no.
What's sugur? No, I'm serious, what's sugur?!
No
Finely ground sugar is Castor sugar also called superfine sugar. Icing sugar is also a very finely ground sugar
Honey, maple syrup, agave nectar, or a simple syrup can be used as substitutes for corn syrup in icing.
icing sugar, trust me it works
Yes, you can substitute lard for vegetable shortening in buttercream icing, but it will affect the texture and flavor. Lard has a distinct taste that may not be as neutral as shortening, which could alter the overall flavor of the icing. Additionally, lard may make the icing softer, so you might need to adjust the amount of powdered sugar or refrigerate the icing for better consistency.
Dissolving will depend on surface area. Castor sugar has a smaller particle than regular sugar. The smaller the particle the larger the surface area. Surface area: Regular sugar < castor sugar < icing sugar. Castor sugar should dissolve faster than the same mass of regular sugar but slower than the same mass of icing sugar.
Icing sugar and caster sugar are not interchangeable. This is because icing sugar absorbs water whereas caster sugar does not. Switching icing sugar for caster in a baked good recipe will result in a good with a brick-like texture, whereas substituting caster sugar for icing will result in something liquidy and granular.
sugur
Glucose