Often, when my husband and I attend church, there will be a snack table in the back where attendees can grab cookies, pastries, and other treats on their way home. I like to contribute a cake such as this one, since it has enough flavorful elements to be interesting without requiring as much finesse as a layer cake. Baking it in a casserole dish also makes it super-portable.
Find it online: https://foodgardening.mequoda.com/recipe/church-cake/