I researched recipes and found one a few years ago, taking great pains to make it look cute. Elizabeth walked in the door and said, "Grandma, why is there a cow on your table?" So I abandoned the lamb cake idea. Till this year.
You see, someone out there in blogland did a lot of work testing recipes for eight days. Every day a different lamb cake recipe. Her husband, dear boy, agreed to be the taste tester and ate lamb cake for eight days! And then he rated them. She then blogged about it(her blog is called Midcentury Menu). I can't get her site to come up on my site but if you google "eight days of lamb cakes" it comes right up. Do so, it's great fun. I decided, based on her dear husband's judgement to do the Pope family's cake recipe (day 4.)
I learned two new things. New thing #1 fill just the one half (the front half). Put the lid on and the cake will rise to fill the mold. Honestly, I didn't know this! I tried this cake about 25 years ago using a boxed mix (big mistake, box mixes are too fluffy. You need pound cake consistency) and again when Elizabeth said it looked like a cow. What I had done was baked the two halves and cemented them together with frosting. So this filling the half was big news. And SO much easier.
New thing #2. Use toothpicks to stabilize the ears and a popsicle stick to stabilize the neck. Bake them right in. A headless lamb is not impressive on the dinner table.