These are raspberry swirl cupcakes, and you can find the recipe here.
Another couple I followed was a husband/wife team who have a company called Tiger in a Jar and they made (make? I assume they're still in business) amazing and very pretty videos, some of which are about food. The most recent one I can find is, unfortunately, a Vimeo video with restrictions on embedding, so I can only provide the link for the Pumpkin Bread Pudding recipe, but here's an old favorite, Beet Cake.
And then there's also this video where 3 teams of chefs attempt to create works of art with food:
What fun! Enjoy!