miniature lemon cupcakes with blueberry filling and blueberry buttercream icing

I love using boxed cake mix as a base for cupcakes or cakes.  It cuts time and labor by pre-measuring flour, sugar, baking powder and soda... need I say more. For these mini cupcakes, I started with a box of Lemon Supreme cake mix (prepared according to box instructions, reducing the cupcake baking time to 16 minutes for the miniature sized version) and went from there. I filled the cupcakes with blueberry jam, and made classic buttercream icing, then mixed jam and a squirt of lemon juice into the icing as well.  Despite appearances, I'm not a big icing fan... but I did love the taste of the cupcake and filling, with just a little less icing on top for me. Plus, they look perfect for Spring!