Need shortbread recipe for mold pans

Product Description

So I got these cockle shell pans presumably designed for madeleines and they work a treat that way. But would love to make sandwich cookies, which would mimic the look of whole clams. Found a few recipes for that but the texture of the cookies produced all seem kinda bubbly/flakey; am looking for something that will produce a tighter, smoother crumb, to better counterfeit the surface of a real seashell. I'd glaze the finished product like abalone, natch. ;-)[This is the general idea of what I'm after, minus the linen and pearls.

Shortbread - Polish Housewife

Easy Shortbread Cookie Recipe

Lemon Shortbread Cookies - Erren's Kitchen

My Favorite Cookie: Shortbread – Twizzling Whimsies

Scottish Shortbread Recipe, food

Classic Shortbread Cookies

Bake beautiful Scottish shortbread - CNET

Summertime Peanut Shortbread Emerson Creek Pottery 's Handmade Pottery

Traditional Scottish Shortbread

Martha's Scottish Shortbread Recipe