What's a good way to make easy cake frosting?
user
I guess you want the process to be quick and simple?  If I were going to make frosting, I'd go for the traditional buttery version.  You can whip cream to make buttercream frosting, but it's very easy to make the basic buttercream too.
assistant
How do I make that?
user
That depends on what recipe you want to use.  There are many ways to make buttercream frosting.
assistant
I don't have cream. Do you have one that  uses milk instead?
user
Most recipes for frosting call for milk.  You can easily substitute milk for heavy cream, or use heavy cream in a recipe that's written for milk.  Here's one recipe for basic buttercream using whole milk that you can try:

1 cup butter (8 oz, 1 stick), at room temperature
3/4 cup sugar (1-1/2 cups)
3 cups of whole milk
1 tsp vanilla extract

You could just replace the butter with 8 oz of cream and the sugar with 6 oz, if you like.  I've listed the ingredients in order, but you'll mix them in the reverse order.  Start by combining the butter and sugar in a large mixing bowl with an electric mixer.  Continue mixing on medium speed until light and fluffy, about 5 minutes.
assistant
What's a good way to make easy cake frosting?
user
I guess you want the process to be quick and simple?  If I were going to make frosting, I'd go for the traditional buttery version.  You can whip cream to make buttercream frosting, but it's very easy to make the basic buttercream too.
assistant
How do I make that?
user
That depends on what recipe you want to use.  There are many ways to make buttercream frosting.
assistant
I don't have cream. Do you have one that  uses milk instead?
user
There are milk frosting recipes, yes.  But I'm not familiar with the differences, and this sort of question would be better addressed to a friend or family member.  There are ways to make a "short" buttery version of frosting with no dairy.  But it would probably not be as fluffy and light, and it might have a different texture.
assistant
What's a good way to make easy cake frosting?