You could make brownies in your mini muffin pan.....
If you have the time to use the pans again, I make brownies in my mini muffin pans, and top them with Debbie in GA's chocolate blender frosting with a decorative piping tip.
I'm really not very good at piping, but if you use the tip with a serrated edge, and just pipe a swirl, it looks pretty. The frosting is fudgy and shiny, and holds a shape when you pipe it.
If you want brownies of a different shape, like Luisa suggested, you could always just bake a pan of brownies, and cut them out with a small heart shaped cookie cutters smileys/smile.gif
Here's Debbie's frosting recipe, from Favorites:
Chocolate Frosting
6 ounces unsweetened chocolate
1 cup plus 2 tablespoons evaporated milk
1 1/2 cups granulated sugar
Melt the chocolate in the top of a double boiler placed over the simmering water. Cool slightly.
Blend the evaporated milk and sugar in a blender on medium speed for 2 seconds. Add the chocolate to the sugar mixture in the blender and blend on high speed until the frosting is thick and shiny, 1 to 1 1/2minutes. The mixer's sound will change when the frosting has thickened.
Spoon the frosting into a bowl and allow it to set at room temperature for 30 minutes. Then cover the bowl with plastic wrap and allow the frosting to set for 1 hour more before frosting.
*Do not refrigerate the frosting*, even if you don't plan to use it for several days. Makes 1 3/4 cups, enough to fill and frost a two-layer cake.
NOTES : This frosting can only be made in a blender.
Description: "The Best." Source: "Rosie's Bakery All-Butter Fresh Cream Sugar-Packed No Holds Barred Baking Book" Copyright: "1991" Yield: "1 3/4 cups"
http://www.finerkitchens.com/swap/forum/index.php?action=display&forumid=6&msgid=24