i've been trying some different recipes, but none of the cakes that i use are dense enough to put stuff on top of. They all turn out fluffy like grocery store cakes. Any good ideas for a dense cake?

if you bake from scratch, then i suggest a victoria sponge, i love it.http://www.bbc.co.uk/food/recipes/database/victoriaspongewithst_90309.shtml
if you use box mixes then look up the wasc recipe on here.
xx