Here are a few quilts I've made using patterns designed for layer cakes:
Hello Sunshine, based on a pattern called Changes
Magic Eight Ball (my tutorial here)
Christmas Ribbons, based on a patter called Ruby's Ribbon Box
I did actually use a layer cake for Magic Eight Ball. For the others, a mix of fat quarters and odds 'n ends from my stash.
I found seven yet-to-be-used patterns in my collection, all designed for layer cakes. I think Margot of The Pattern Box is a layer cake enthusiast; four of my patterns are her work and Jubilee is also her design.
I like the pattern Sweet Pea so much, I actually broke down and bought a layer cake of Honeysweet, the newest fabric collection from Fig Tree Designs. I know, I know, I'm supposed to be using my Fig Tree stash, not adding to it!
Fig Tree has some layer cake friendly patterns as well. I have Butterscotch Tart and Boardwalk in my collection, waiting for the right fabric inspiration to come along.
And high on my quilt to-do list is Odile Stars from Planted Seed Designs. I LOVE the look of these star blocks. But an important note, I've just realized this pattern uses 25 fat quarters, not a layer cake. That's OK, I have plenty of fat quarters in my stash.
Have any layer cake patterns caught your eye lately?