Lego Brownies. Just bake up a batch of your favorite brownies, frost in bright primary colors, and top with assorted matching candy pieces. There are other awesome ideas on this site for a Lego themed party. Love the simplicity.
Cadbury Creme Egg Cupcakes. Made with favorite chocolate cupcake recipe, mini cadbury creme eggs, yellow food coloring. The buttercream frosting is made with butter, sea salt, vanilla, confectioners' sugar, and heavy cream.