For some odd reason, I never consider my icing sugar inventory when I start a baking project. I just assume my cupboard has an infinite supply of icing sugar. So nothing grinds my gears more than it being way past midnight (me thinking that’s an ideal time to start the frosting) and discovering I do not have enough icing to make a crumb coat let alone icing the whole thing. What sucks more is I purposely made an ingredient run to the grocery store that day and still disregarded adding icing sugar to the list. 

Solution? Make my own!

What you need: blender or processor, granulated sugar (or regular sugar for you n00bs) and corn starch (1 cup of sugar : 1 tbsp. corn starch). Grind the sugar into a powder then add the corn starch. The corn starch acts as a binding agent so that the formerly known sugar can react properly with the other ingredients in your frosting recipe.