These are in between a cookie and a candy, they are heavenly. I made mini ones placed on top of pink frosted chocolate cupcakes for a Valentine's birthday at work last year and they were a huge hit. They are amazing without a cupcake too!
Chocolate Sweet Hearts
1 cup all-purpose flour (spooned and leveled)
1/4 cup unsweetened cocoa powder
1/2 teaspoon baking soda
1/4 teaspoon salt
4 ounces bittersweet or semisweet chocolate, chopped
4 tablespoons (1/2 stick) unsalted butter, cut into pieces
1/2 cup packed light-brown sugar
1 large egg
1. In a bowl, whisk together flour, cocoa, baking soda, and salt. In another bowl set over (not in) a saucepan of simmering water, place chocolate, butter, and brown sugar; stir frequently until almost completely melted. Remove from heat, and stir until completely melted; let cool slightly.
2. Add egg to chocolate mixture. With a mixer on low, beat until well blended. Gradually stir in flour mixture (dough will form a ball).
3. Divide dough in half; roll out each half on a sheet of parchment paper to a 1/4-inch thickness. Transfer each half (still on paper) to a baking sheet; freeze until firm, about 20 minutes.
4. Preheat oven to 350 degrees. Working with one half at a time, flip dough onto a work surface; peel off paper. Using a 2-inch heart-shaped cookie cutter, cut out cookies; place, 1/2 inch apart, on two baking sheets. Bake until firm and fragrant, about 8 to 10 minutes. Transfer cookies to a rack to cool.
To roll out the dough without using flour (which would mar its color), cover your work surface with parchment paper. Once the dough is frozen, you can peel off the paper and cut the cookies directly on the work surface. recipe & picture from Everyday Food, January 2009