My brother was telling me that him and our friend friend wanted to be Finn and Fiona for Halloween, but the did not know where to get the outfits, so that night I made them the hats backpacks and these Jake and Cake dolls.
So this should help you make a general pattern, Don't copy the ones I have posted because they are not sized correctly, but here is an idea.
I drew the design on my fabric free hand, but I cut and sewed the body first so I would have an idea as to how long the arms and legs needed to be.
You might want to hand sew the inner and outer eye together as well as the nose to the mouth.
Cake has the same body, but I will get to her at another time.