Does anyone have a great recipe that will make beautiful and great tasting roses?

I assume you're speaking of buttercream. Use your recipe if you like the flavor. Just make sure it is a hint on the stiff side, about half way between medium to stiff. This has been my experience.

I use a separate recipe from my traditional buttercream and it tastes fine. Use 1/2 cup shortening, 3 cups powdered sugar, drops of water (enough to make it creamy yet stiff), and 1 teaspoon vanilla flavoring. If you set them out a while they will get stiff. Hope that helps!