Crisco is shortening. It is a vegetable based fat, with a lard consistency. You will definitely have to make a whipped icing, classic icings are usually buttercreams made with the ingredients you are trying to avoid.
If you can find Rich's Bettercreme, it is easy and tasty. All you do is whip it with an electric mixer until it forms soft peaks (about 5-7 min). It is what grocery store bakeries usually use on their cakes.
The best part is that you can add a box of any flavor pudding mix or stir in oreos, toffee bits etc. to change the flavor. I have heard Sam's Club sells it, you may have to ask the bakers. I get it from my local grocery store but I have to ask the bakery dept.
To get it for me. A quart will make enough to ice 2 round cakes. If you are looking for how to make an icing with ingredients on hand, powdered sugar mixed with a small amount of liquid (water, juice, liquor) will make a glaze that you can drizzle over top.
It will be like a glazed donut. Flavored rums are ... more.
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