Sinningia ‘Butter and Cream’ is a hybrid created by Dave Zaitlin, and is a cross between Sinningia aggregata (yellow flowered form) and Sinningia tubiflora. This specimen was exhibited at the 2016 convention show of the Gesneriad Society.
A closer view of the flowers, illustrating the flowers shading from yellow in bud to pure white when mature, can be seen here.