Can you use jam as a filling if it isnt seedless? Will it not taste good?

I like using it as a filling! I've done it many times.

I have used "seedless" raspberry and strawberry jams as fillings. However, I usually put a thin coat of buttercream on the layer first, then top with a thin filling of the jam. (Don't forget the icing dam around the edge!)

I forgot the dam once and it wasn't good!

Good Luck!

I use it all the time!

I second srkmilklady's comment on the thin coat of buttercream. If you don't the jam seeps into the cake and can make it soggy. Deffinately use a dam!