I am not sure what nonprofits but since many of the runners run on behalf of Team In Training or other organizations so it might be nice to donate that way.
Here's some Boston Cream Pie Cupcakes from prior posts on Cupcakes Take The Cake.
- Boston Cream Pie Cupcakes via The Kitchn
- Mini Boston Cream Valentine's Day Cupcakes with Recipe
- Banana Cream Pie Cupcake by Emily at Sugar Plum