Great idea for Christmas cookie cutters too! Brownie Hearts and Brownie Bites Recipe -- After you cut out the hearts, roll the brownie leftovers into bite-size morsels. Once coated with cocoa or sugar, they resemble truffles. You'll get about 44 bites.
How to Make Buttercream That Sets Firm: Crusting Buttercream
A crusting buttercream is one that will set up firmly enough so that it can be touched lightly without making a mark. Although still relatively delicate, this buttercream technique can be a very helpf (How To Make Cake Fondant)